[svn-r17616] Purpose:

    CFLAGS overhaul

Description:

    Modified the way configure handles CFLAGS.

    (note: all changes also apply to FCFLAGS, CXXFLAGS, CPPFLAGS, and LDFLAGS).

    1. The configure process will now always preserve a user's CFLAGS
    environment variable setup. Any additional flags necessary for compilation
    added at configure time will be passed into the Makefiles as AM_CFLAGS,
    which is an automake construct to be used in addition to CFLAGS.

    This will allow a user to have the final say, as CFLAGS will always appear
    later in the compile line than AM_CFLAGS. Additionally, setting CFLAGS
    during make will no longer completely erase all flags set by configure,
    since they're maintained in AM_CFLAGS.

    2. Additionally, where possible, flags previously being assigned directly
    into CFLAGS (and thus propagating into h5cc) have now been redirected into
    H5_CFLAGS, so they're used ONLY for compiling hdf5, and not embedded into
    the h5cc wrapper script as well.

    *Note that H5_CFLAGS ultimately is assigned into AM_CFLAGS for use in the
    Makefiles. Complete description of changes and build process will be
    included in a Configure Document that Elena and I are working on.

    3. Removed unsupported config files. This includes:

       config/dec-osf*
       config/hpux11.00
       config/irix5.x
       config/powerpc-ibm-aix4.x
       config/rs6000-ibm-aix5.x
       config/unicos*

     4. Modified configure summary to display additional values. Specifically,
     appropriate AM_* variables are being shown, as well as H5_FCFLAGS and
     H5_CXXFLAGS, which were for some reason not already present.

Tested:

    - H5committest
    - Tested on all THG / NCSA machines, using several combinations of the more
      prominent configure options (c++, fortran, szip, threadsafe, parallel,
      et cetera). (Thanks to Quincey for rysnc testing setup!)
    - With regards to new automated testing, anything *necessary* for
      compilation will be caught by the daily tests as it stands now. (i.e.,
      if LDFLAGS is not properly set when szip is used, linking will fail).
      Additionally, with regards to which flags get into h5cc, if any
      *necessary* flags have been improperly removed, then daily tests should
      fail during make installcheck. Additional machine-specific desired
      behaviors and/or checks may have to be set up separately within the
      daily tests, so this is something to work on.

21 files changed, 243 insertions, 142 deletions

diff --git a/hl/Makefile.in b/hl/Makefile.in
index 07dbefc..addfd5a 100755
--- a/hl/Makefile.in
+++ b/hl/Makefile.in
@@ -114,6 +114,16 @@ am__relativize = \
 ACLOCAL = /home1/packages/automake/automake-1.9.6/bin/aclocal-1.9 -I /afs/ncsa/projects/hdf/packages/libtool_1.5.14/Linux_2.4/share/aclocal
 ADD_PARALLEL_FILES = @ADD_PARALLEL_FILES@
 AMTAR = @AMTAR@
+
+# H5_CFLAGS holds flags that should be used when building hdf5,
+# but which should not be exported to h5cc for building other programs.
+# AM_CFLAGS is an automake construct which should be used by Makefiles 
+# instead of CFLAGS, as CFLAGS is reserved solely for the user to define.
+AM_CFLAGS = @AM_CFLAGS@ @H5_CFLAGS@
+AM_CPPFLAGS = @AM_CPPFLAGS@ @H5_CPPFLAGS@
+AM_CXXFLAGS = @AM_CXXFLAGS@ @H5_CXXFLAGS@
+AM_FCFLAGS = @AM_FCFLAGS@ @H5_FCFLAGS@
+AM_LDFLAGS = @AM_LDFLAGS@
 AM_MAKEFLAGS = @AM_MAKEFLAGS@
 AR = @AR@
 
@@ -127,21 +137,18 @@ BYTESEX = @BYTESEX@
 CC = @CC@
 CCDEPMODE = @CCDEPMODE@
 CC_VERSION = @CC_VERSION@
-
-# H5_CFLAGS holds flags that should be used as CFLAGS when building hdf5,
-# but which shouldn't be exported to h5cc for building other programs.
-CFLAGS = @CFLAGS@ @H5_CFLAGS@
+CFLAGS = @CFLAGS@
 CLEARFILEBUF = @CLEARFILEBUF@
 CODESTACK = @CODESTACK@
 CONFIG_DATE = @CONFIG_DATE@
 CONFIG_MODE = @CONFIG_MODE@
 CONFIG_USER = @CONFIG_USER@
 CPP = @CPP@
-CPPFLAGS = @CPPFLAGS@ @H5_CPPFLAGS@
+CPPFLAGS = @CPPFLAGS@
 CXX = @CXX@
 CXXCPP = @CXXCPP@
 CXXDEPMODE = @CXXDEPMODE@
-CXXFLAGS = @CXXFLAGS@ @H5_CXXFLAGS@
+CXXFLAGS = @CXXFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEBUG_PKG = @DEBUG_PKG@
 DEFAULT_API_VERSION = @DEFAULT_API_VERSION@
@@ -164,7 +171,7 @@ F9XMODEXT = @F9XMODEXT@
 F9XMODFLAG = @F9XMODFLAG@
 F9XSUFFIXFLAG = @F9XSUFFIXFLAG@
 FC = @FC@
-FCFLAGS = @FCFLAGS@ @H5_FCFLAGS@
+FCFLAGS = @FCFLAGS@
 FCFLAGS_f90 = @FCFLAGS_f90@
 FCLIBS = @FCLIBS@
 FGREP = @FGREP@
diff --git a/hl/c++/Makefile.in b/hl/c++/Makefile.in
index a2535cd..87a582c 100644
--- a/hl/c++/Makefile.in
+++ b/hl/c++/Makefile.in
@@ -110,6 +110,16 @@ am__relativize = \
 ACLOCAL = /home1/packages/automake/automake-1.9.6/bin/aclocal-1.9 -I /afs/ncsa/projects/hdf/packages/libtool_1.5.14/Linux_2.4/share/aclocal
 ADD_PARALLEL_FILES = @ADD_PARALLEL_FILES@
 AMTAR = @AMTAR@
+
+# H5_CFLAGS holds flags that should be used when building hdf5,
+# but which should not be exported to h5cc for building other programs.
+# AM_CFLAGS is an automake construct which should be used by Makefiles 
+# instead of CFLAGS, as CFLAGS is reserved solely for the user to define.
+AM_CFLAGS = @AM_CFLAGS@ @H5_CFLAGS@
+AM_CPPFLAGS = @AM_CPPFLAGS@ @H5_CPPFLAGS@
+AM_CXXFLAGS = @AM_CXXFLAGS@ @H5_CXXFLAGS@
+AM_FCFLAGS = @AM_FCFLAGS@ @H5_FCFLAGS@
+AM_LDFLAGS = @AM_LDFLAGS@
 AM_MAKEFLAGS = @AM_MAKEFLAGS@
 AR = @AR@
 
@@ -123,21 +133,18 @@ BYTESEX = @BYTESEX@
 CC = @CC@
 CCDEPMODE = @CCDEPMODE@
 CC_VERSION = @CC_VERSION@
-
-# H5_CFLAGS holds flags that should be used as CFLAGS when building hdf5,
-# but which shouldn't be exported to h5cc for building other programs.
-CFLAGS = @CFLAGS@ @H5_CFLAGS@
+CFLAGS = @CFLAGS@
 CLEARFILEBUF = @CLEARFILEBUF@
 CODESTACK = @CODESTACK@
 CONFIG_DATE = @CONFIG_DATE@
 CONFIG_MODE = @CONFIG_MODE@
 CONFIG_USER = @CONFIG_USER@
 CPP = @CPP@
-CPPFLAGS = @CPPFLAGS@ @H5_CPPFLAGS@
+CPPFLAGS = @CPPFLAGS@
 CXX = @CXX@
 CXXCPP = @CXXCPP@
 CXXDEPMODE = @CXXDEPMODE@
-CXXFLAGS = @CXXFLAGS@ @H5_CXXFLAGS@
+CXXFLAGS = @CXXFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEBUG_PKG = @DEBUG_PKG@
 DEFAULT_API_VERSION = @DEFAULT_API_VERSION@
@@ -160,7 +167,7 @@ F9XMODEXT = @F9XMODEXT@
 F9XMODFLAG = @F9XMODFLAG@
 F9XSUFFIXFLAG = @F9XSUFFIXFLAG@
 FC = @FC@
-FCFLAGS = @FCFLAGS@ @H5_FCFLAGS@
+FCFLAGS = @FCFLAGS@
 FCFLAGS_f90 = @FCFLAGS_f90@
 FCLIBS = @FCLIBS@
 FGREP = @FGREP@
diff --git a/hl/c++/examples/Makefile.in b/hl/c++/examples/Makefile.in
index 27e1585..4b11346 100644
--- a/hl/c++/examples/Makefile.in
+++ b/hl/c++/examples/Makefile.in
@@ -76,6 +76,16 @@ DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 ACLOCAL = /home1/packages/automake/automake-1.9.6/bin/aclocal-1.9 -I /afs/ncsa/projects/hdf/packages/libtool_1.5.14/Linux_2.4/share/aclocal
 ADD_PARALLEL_FILES = @ADD_PARALLEL_FILES@
 AMTAR = @AMTAR@
+
+# H5_CFLAGS holds flags that should be used when building hdf5,
+# but which should not be exported to h5cc for building other programs.
+# AM_CFLAGS is an automake construct which should be used by Makefiles 
+# instead of CFLAGS, as CFLAGS is reserved solely for the user to define.
+AM_CFLAGS = @AM_CFLAGS@ @H5_CFLAGS@
+AM_CPPFLAGS = @AM_CPPFLAGS@ @H5_CPPFLAGS@
+AM_CXXFLAGS = @AM_CXXFLAGS@ @H5_CXXFLAGS@
+AM_FCFLAGS = @AM_FCFLAGS@ @H5_FCFLAGS@
+AM_LDFLAGS = @AM_LDFLAGS@
 AM_MAKEFLAGS = @AM_MAKEFLAGS@
 AR = @AR@
 
@@ -89,21 +99,18 @@ BYTESEX = @BYTESEX@
 CC = @CC@
 CCDEPMODE = @CCDEPMODE@
 CC_VERSION = @CC_VERSION@
-
-# H5_CFLAGS holds flags that should be used as CFLAGS when building hdf5,
-# but which shouldn't be exported to h5cc for building other programs.
-CFLAGS = @CFLAGS@ @H5_CFLAGS@
+CFLAGS = @CFLAGS@
 CLEARFILEBUF = @CLEARFILEBUF@
 CODESTACK = @CODESTACK@
 CONFIG_DATE = @CONFIG_DATE@
 CONFIG_MODE = @CONFIG_MODE@
 CONFIG_USER = @CONFIG_USER@
 CPP = @CPP@
-CPPFLAGS = @CPPFLAGS@ @H5_CPPFLAGS@
+CPPFLAGS = @CPPFLAGS@
 CXX = @CXX@
 CXXCPP = @CXXCPP@
 CXXDEPMODE = @CXXDEPMODE@
-CXXFLAGS = @CXXFLAGS@ @H5_CXXFLAGS@
+CXXFLAGS = @CXXFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEBUG_PKG = @DEBUG_PKG@
 DEFAULT_API_VERSION = @DEFAULT_API_VERSION@
@@ -126,7 +133,7 @@ F9XMODEXT = @F9XMODEXT@
 F9XMODFLAG = @F9XMODFLAG@
 F9XSUFFIXFLAG = @F9XSUFFIXFLAG@
 FC = @FC@
-FCFLAGS = @FCFLAGS@ @H5_FCFLAGS@
+FCFLAGS = @FCFLAGS@
 FCFLAGS_f90 = @FCFLAGS_f90@
 FCLIBS = @FCLIBS@
 FGREP = @FGREP@
diff --git a/hl/c++/src/Makefile.am b/hl/c++/src/Makefile.am
index 1ff24be..15986d6 100644
--- a/hl/c++/src/Makefile.am
+++ b/hl/c++/src/Makefile.am
@@ -28,12 +28,12 @@ INCLUDES=-I$(top_srcdir)/src -I$(top_srcdir)/hl/src
 lib_LTLIBRARIES=libhdf5_hl_cpp.la
 
 # Add libtool numbers to the HDF5 HL C++ library (from config/lt_vers.am)
-libhdf5_hl_cpp_la_LDFLAGS= -version-info $(LT_VERS_INTERFACE):$(LT_VERS_REVISION):$(LT_VERS_AGE)
+libhdf5_hl_cpp_la_LDFLAGS= -version-info $(LT_VERS_INTERFACE):$(LT_VERS_REVISION):$(LT_VERS_AGE) $(AM_LDFLAGS)
 
 # Shared C++ libraries aren't universally supported.
 if CXX_SHARED_CONDITIONAL
 else
-  AM_LDFLAGS=-static
+  AM_LDFLAGS+=-static
 endif
 
 # Source files for the library
diff --git a/hl/c++/src/Makefile.in b/hl/c++/src/Makefile.in
index 04ba436..6acd8d0 100644
--- a/hl/c++/src/Makefile.in
+++ b/hl/c++/src/Makefile.in
@@ -56,6 +56,9 @@ DIST_COMMON = $(include_HEADERS) $(srcdir)/Makefile.am \
 	$(srcdir)/Makefile.in $(top_srcdir)/config/commence.am \
 	$(top_srcdir)/config/conclude.am \
 	$(top_srcdir)/config/lt_vers.am
+
+# Shared C++ libraries aren't universally supported.
+@CXX_SHARED_CONDITIONAL_FALSE@am__append_1 = -static
 TESTS =
 subdir = hl/c++/src
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
@@ -119,6 +122,16 @@ DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 ACLOCAL = /home1/packages/automake/automake-1.9.6/bin/aclocal-1.9 -I /afs/ncsa/projects/hdf/packages/libtool_1.5.14/Linux_2.4/share/aclocal
 ADD_PARALLEL_FILES = @ADD_PARALLEL_FILES@
 AMTAR = @AMTAR@
+
+# H5_CFLAGS holds flags that should be used when building hdf5,
+# but which should not be exported to h5cc for building other programs.
+# AM_CFLAGS is an automake construct which should be used by Makefiles 
+# instead of CFLAGS, as CFLAGS is reserved solely for the user to define.
+AM_CFLAGS = @AM_CFLAGS@ @H5_CFLAGS@
+AM_CPPFLAGS = @AM_CPPFLAGS@ @H5_CPPFLAGS@
+AM_CXXFLAGS = @AM_CXXFLAGS@ @H5_CXXFLAGS@
+AM_FCFLAGS = @AM_FCFLAGS@ @H5_FCFLAGS@
+AM_LDFLAGS = @AM_LDFLAGS@ $(am__append_1)
 AM_MAKEFLAGS = @AM_MAKEFLAGS@
 AR = @AR@
 
@@ -132,21 +145,18 @@ BYTESEX = @BYTESEX@
 CC = @CC@
 CCDEPMODE = @CCDEPMODE@
 CC_VERSION = @CC_VERSION@
-
-# H5_CFLAGS holds flags that should be used as CFLAGS when building hdf5,
-# but which shouldn't be exported to h5cc for building other programs.
-CFLAGS = @CFLAGS@ @H5_CFLAGS@
+CFLAGS = @CFLAGS@
 CLEARFILEBUF = @CLEARFILEBUF@
 CODESTACK = @CODESTACK@
 CONFIG_DATE = @CONFIG_DATE@
 CONFIG_MODE = @CONFIG_MODE@
 CONFIG_USER = @CONFIG_USER@
 CPP = @CPP@
-CPPFLAGS = @CPPFLAGS@ @H5_CPPFLAGS@
+CPPFLAGS = @CPPFLAGS@
 CXX = @CXX@
 CXXCPP = @CXXCPP@
 CXXDEPMODE = @CXXDEPMODE@
-CXXFLAGS = @CXXFLAGS@ @H5_CXXFLAGS@
+CXXFLAGS = @CXXFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEBUG_PKG = @DEBUG_PKG@
 DEFAULT_API_VERSION = @DEFAULT_API_VERSION@
@@ -169,7 +179,7 @@ F9XMODEXT = @F9XMODEXT@
 F9XMODFLAG = @F9XMODFLAG@
 F9XSUFFIXFLAG = @F9XSUFFIXFLAG@
 FC = @FC@
-FCFLAGS = @FCFLAGS@ @H5_FCFLAGS@
+FCFLAGS = @FCFLAGS@
 FCFLAGS_f90 = @FCFLAGS_f90@
 FCLIBS = @FCLIBS@
 FGREP = @FGREP@
@@ -380,10 +390,7 @@ INCLUDES = -I$(top_srcdir)/src -I$(top_srcdir)/hl/src
 lib_LTLIBRARIES = libhdf5_hl_cpp.la
 
 # Add libtool numbers to the HDF5 HL C++ library (from config/lt_vers.am)
-libhdf5_hl_cpp_la_LDFLAGS = -version-info $(LT_VERS_INTERFACE):$(LT_VERS_REVISION):$(LT_VERS_AGE)
-
-# Shared C++ libraries aren't universally supported.
-@CXX_SHARED_CONDITIONAL_FALSE@AM_LDFLAGS = -static
+libhdf5_hl_cpp_la_LDFLAGS = -version-info $(LT_VERS_INTERFACE):$(LT_VERS_REVISION):$(LT_VERS_AGE) $(AM_LDFLAGS)
 
 # Source files for the library
 # At the moment, only the H5PT Packet Table has a C++ API.
diff --git a/hl/c++/test/Makefile.am b/hl/c++/test/Makefile.am
index beebc33..6dcea1c 100644
--- a/hl/c++/test/Makefile.am
+++ b/hl/c++/test/Makefile.am
@@ -26,7 +26,7 @@ INCLUDES=-I$(top_srcdir)/src -I$(top_srcdir)/c++/src -I$(top_srcdir)/hl/src -I$(
 # Shared C++ libraries aren't universally supported.
 if CXX_SHARED_CONDITIONAL
 else
-  AM_LDFLAGS=-static
+  AM_LDFLAGS+=-static
 endif
 
 # These are our main targets.  They should be listed in the order to be
diff --git a/hl/c++/test/Makefile.in b/hl/c++/test/Makefile.in
index c2de2e7..6bb1a99 100644
--- a/hl/c++/test/Makefile.in
+++ b/hl/c++/test/Makefile.in
@@ -53,6 +53,9 @@ host_triplet = @host@
 DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in \
 	$(top_srcdir)/config/commence.am \
 	$(top_srcdir)/config/conclude.am
+
+# Shared C++ libraries aren't universally supported.
+@CXX_SHARED_CONDITIONAL_FALSE@am__append_1 = -static
 check_PROGRAMS = $(am__EXEEXT_1)
 TESTS = $(check_PROGRAMS)
 subdir = hl/c++/test
@@ -93,6 +96,16 @@ DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 ACLOCAL = /home1/packages/automake/automake-1.9.6/bin/aclocal-1.9 -I /afs/ncsa/projects/hdf/packages/libtool_1.5.14/Linux_2.4/share/aclocal
 ADD_PARALLEL_FILES = @ADD_PARALLEL_FILES@
 AMTAR = @AMTAR@
+
+# H5_CFLAGS holds flags that should be used when building hdf5,
+# but which should not be exported to h5cc for building other programs.
+# AM_CFLAGS is an automake construct which should be used by Makefiles 
+# instead of CFLAGS, as CFLAGS is reserved solely for the user to define.
+AM_CFLAGS = @AM_CFLAGS@ @H5_CFLAGS@
+AM_CPPFLAGS = @AM_CPPFLAGS@ @H5_CPPFLAGS@
+AM_CXXFLAGS = @AM_CXXFLAGS@ @H5_CXXFLAGS@
+AM_FCFLAGS = @AM_FCFLAGS@ @H5_FCFLAGS@
+AM_LDFLAGS = @AM_LDFLAGS@ $(am__append_1)
 AM_MAKEFLAGS = @AM_MAKEFLAGS@
 AR = @AR@
 
@@ -106,21 +119,18 @@ BYTESEX = @BYTESEX@
 CC = @CC@
 CCDEPMODE = @CCDEPMODE@
 CC_VERSION = @CC_VERSION@
-
-# H5_CFLAGS holds flags that should be used as CFLAGS when building hdf5,
-# but which shouldn't be exported to h5cc for building other programs.
-CFLAGS = @CFLAGS@ @H5_CFLAGS@
+CFLAGS = @CFLAGS@
 CLEARFILEBUF = @CLEARFILEBUF@
 CODESTACK = @CODESTACK@
 CONFIG_DATE = @CONFIG_DATE@
 CONFIG_MODE = @CONFIG_MODE@
 CONFIG_USER = @CONFIG_USER@
 CPP = @CPP@
-CPPFLAGS = @CPPFLAGS@ @H5_CPPFLAGS@
+CPPFLAGS = @CPPFLAGS@
 CXX = @CXX@
 CXXCPP = @CXXCPP@
 CXXDEPMODE = @CXXDEPMODE@
-CXXFLAGS = @CXXFLAGS@ @H5_CXXFLAGS@
+CXXFLAGS = @CXXFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEBUG_PKG = @DEBUG_PKG@
 DEFAULT_API_VERSION = @DEFAULT_API_VERSION@
@@ -143,7 +153,7 @@ F9XMODEXT = @F9XMODEXT@
 F9XMODFLAG = @F9XMODFLAG@
 F9XSUFFIXFLAG = @F9XSUFFIXFLAG@
 FC = @FC@
-FCFLAGS = @FCFLAGS@ @H5_FCFLAGS@
+FCFLAGS = @FCFLAGS@
 FCFLAGS_f90 = @FCFLAGS_f90@
 FCLIBS = @FCLIBS@
 FGREP = @FGREP@
@@ -344,9 +354,6 @@ CHECK_CLEANFILES = *.chkexe *.chklog *.clog
 # Include directories
 INCLUDES = -I$(top_srcdir)/src -I$(top_srcdir)/c++/src -I$(top_srcdir)/hl/src -I$(top_srcdir)/hl/c++/src -I$(top_srcdir)/test -I$(top_builddir)/hl/test -I$(top_srcdir)/hl/test
 
-# Shared C++ libraries aren't universally supported.
-@CXX_SHARED_CONDITIONAL_FALSE@AM_LDFLAGS = -static
-
 # These are our main targets.  They should be listed in the order to be
 # executed, generally most specific tests to least specific tests.
 TEST_PROG = ptableTest
diff --git a/hl/examples/Makefile.in b/hl/examples/Makefile.in
index 0a2ec12..0380eaf 100644
--- a/hl/examples/Makefile.in
+++ b/hl/examples/Makefile.in
@@ -76,6 +76,16 @@ DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 ACLOCAL = /home1/packages/automake/automake-1.9.6/bin/aclocal-1.9 -I /afs/ncsa/projects/hdf/packages/libtool_1.5.14/Linux_2.4/share/aclocal
 ADD_PARALLEL_FILES = @ADD_PARALLEL_FILES@
 AMTAR = @AMTAR@
+
+# H5_CFLAGS holds flags that should be used when building hdf5,
+# but which should not be exported to h5cc for building other programs.
+# AM_CFLAGS is an automake construct which should be used by Makefiles 
+# instead of CFLAGS, as CFLAGS is reserved solely for the user to define.
+AM_CFLAGS = @AM_CFLAGS@ @H5_CFLAGS@
+AM_CPPFLAGS = @AM_CPPFLAGS@ @H5_CPPFLAGS@
+AM_CXXFLAGS = @AM_CXXFLAGS@ @H5_CXXFLAGS@
+AM_FCFLAGS = @AM_FCFLAGS@ @H5_FCFLAGS@
+AM_LDFLAGS = @AM_LDFLAGS@
 AM_MAKEFLAGS = @AM_MAKEFLAGS@
 AR = @AR@
 
@@ -89,21 +99,18 @@ BYTESEX = @BYTESEX@
 CC = @CC@
 CCDEPMODE = @CCDEPMODE@
 CC_VERSION = @CC_VERSION@
-
-# H5_CFLAGS holds flags that should be used as CFLAGS when building hdf5,
-# but which shouldn't be exported to h5cc for building other programs.
-CFLAGS = @CFLAGS@ @H5_CFLAGS@
+CFLAGS = @CFLAGS@
 CLEARFILEBUF = @CLEARFILEBUF@
 CODESTACK = @CODESTACK@
 CONFIG_DATE = @CONFIG_DATE@
 CONFIG_MODE = @CONFIG_MODE@
 CONFIG_USER = @CONFIG_USER@
 CPP = @CPP@
-CPPFLAGS = @CPPFLAGS@ @H5_CPPFLAGS@
+CPPFLAGS = @CPPFLAGS@
 CXX = @CXX@
 CXXCPP = @CXXCPP@
 CXXDEPMODE = @CXXDEPMODE@
-CXXFLAGS = @CXXFLAGS@ @H5_CXXFLAGS@
+CXXFLAGS = @CXXFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEBUG_PKG = @DEBUG_PKG@
 DEFAULT_API_VERSION = @DEFAULT_API_VERSION@
@@ -126,7 +133,7 @@ F9XMODEXT = @F9XMODEXT@
 F9XMODFLAG = @F9XMODFLAG@
 F9XSUFFIXFLAG = @F9XSUFFIXFLAG@
 FC = @FC@
-FCFLAGS = @FCFLAGS@ @H5_FCFLAGS@
+FCFLAGS = @FCFLAGS@
 FCFLAGS_f90 = @FCFLAGS_f90@
 FCLIBS = @FCLIBS@
 FGREP = @FGREP@
diff --git a/hl/fortran/Makefile.in b/hl/fortran/Makefile.in
index 9daf03a..79e0ce5 100644
--- a/hl/fortran/Makefile.in
+++ b/hl/fortran/Makefile.in
@@ -114,6 +114,16 @@ am__relativize = \
 ACLOCAL = /home1/packages/automake/automake-1.9.6/bin/aclocal-1.9 -I /afs/ncsa/projects/hdf/packages/libtool_1.5.14/Linux_2.4/share/aclocal
 ADD_PARALLEL_FILES = @ADD_PARALLEL_FILES@
 AMTAR = @AMTAR@
+
+# H5_CFLAGS holds flags that should be used when building hdf5,
+# but which should not be exported to h5cc for building other programs.
+# AM_CFLAGS is an automake construct which should be used by Makefiles 
+# instead of CFLAGS, as CFLAGS is reserved solely for the user to define.
+AM_CFLAGS = @AM_CFLAGS@ @H5_CFLAGS@
+AM_CPPFLAGS = @AM_CPPFLAGS@ @H5_CPPFLAGS@
+AM_CXXFLAGS = @AM_CXXFLAGS@ @H5_CXXFLAGS@
+AM_FCFLAGS = @AM_FCFLAGS@ @H5_FCFLAGS@
+AM_LDFLAGS = @AM_LDFLAGS@
 AM_MAKEFLAGS = @AM_MAKEFLAGS@
 AR = @AR@
 
@@ -127,21 +137,18 @@ BYTESEX = @BYTESEX@
 CC = @CC@
 CCDEPMODE = @CCDEPMODE@
 CC_VERSION = @CC_VERSION@
-
-# H5_CFLAGS holds flags that should be used as CFLAGS when building hdf5,
-# but which shouldn't be exported to h5cc for building other programs.
-CFLAGS = @CFLAGS@ @H5_CFLAGS@
+CFLAGS = @CFLAGS@
 CLEARFILEBUF = @CLEARFILEBUF@
 CODESTACK = @CODESTACK@
 CONFIG_DATE = @CONFIG_DATE@
 CONFIG_MODE = @CONFIG_MODE@
 CONFIG_USER = @CONFIG_USER@
 CPP = @CPP@
-CPPFLAGS = @CPPFLAGS@ @H5_CPPFLAGS@
+CPPFLAGS = @CPPFLAGS@
 CXX = @CXX@
 CXXCPP = @CXXCPP@
 CXXDEPMODE = @CXXDEPMODE@
-CXXFLAGS = @CXXFLAGS@ @H5_CXXFLAGS@
+CXXFLAGS = @CXXFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEBUG_PKG = @DEBUG_PKG@
 DEFAULT_API_VERSION = @DEFAULT_API_VERSION@
@@ -164,7 +171,7 @@ F9XMODEXT = @F9XMODEXT@
 F9XMODFLAG = @F9XMODFLAG@
 F9XSUFFIXFLAG = @F9XSUFFIXFLAG@
 FC = @FC@
-FCFLAGS = @FCFLAGS@ @H5_FCFLAGS@
+FCFLAGS = @FCFLAGS@
 FCFLAGS_f90 = @FCFLAGS_f90@
 FCLIBS = @FCLIBS@
 FGREP = @FGREP@
diff --git a/hl/fortran/examples/Makefile.in b/hl/fortran/examples/Makefile.in
index 0e59a7d..698ffbf 100644
--- a/hl/fortran/examples/Makefile.in
+++ b/hl/fortran/examples/Makefile.in
@@ -76,6 +76,16 @@ DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 ACLOCAL = /home1/packages/automake/automake-1.9.6/bin/aclocal-1.9 -I /afs/ncsa/projects/hdf/packages/libtool_1.5.14/Linux_2.4/share/aclocal
 ADD_PARALLEL_FILES = @ADD_PARALLEL_FILES@
 AMTAR = @AMTAR@
+
+# H5_CFLAGS holds flags that should be used when building hdf5,
+# but which should not be exported to h5cc for building other programs.
+# AM_CFLAGS is an automake construct which should be used by Makefiles 
+# instead of CFLAGS, as CFLAGS is reserved solely for the user to define.
+AM_CFLAGS = @AM_CFLAGS@ @H5_CFLAGS@
+AM_CPPFLAGS = @AM_CPPFLAGS@ @H5_CPPFLAGS@
+AM_CXXFLAGS = @AM_CXXFLAGS@ @H5_CXXFLAGS@
+AM_FCFLAGS = @AM_FCFLAGS@ @H5_FCFLAGS@
+AM_LDFLAGS = @AM_LDFLAGS@
 AM_MAKEFLAGS = @AM_MAKEFLAGS@
 AR = @AR@
 
@@ -89,21 +99,18 @@ BYTESEX = @BYTESEX@
 CC = @CC@
 CCDEPMODE = @CCDEPMODE@
 CC_VERSION = @CC_VERSION@
-
-# H5_CFLAGS holds flags that should be used as CFLAGS when building hdf5,
-# but which shouldn't be exported to h5cc for building other programs.
-CFLAGS = @CFLAGS@ @H5_CFLAGS@
+CFLAGS = @CFLAGS@
 CLEARFILEBUF = @CLEARFILEBUF@
 CODESTACK = @CODESTACK@
 CONFIG_DATE = @CONFIG_DATE@
 CONFIG_MODE = @CONFIG_MODE@
 CONFIG_USER = @CONFIG_USER@
 CPP = @CPP@
-CPPFLAGS = @CPPFLAGS@ @H5_CPPFLAGS@
+CPPFLAGS = @CPPFLAGS@
 CXX = @CXX@
 CXXCPP = @CXXCPP@
 CXXDEPMODE = @CXXDEPMODE@
-CXXFLAGS = @CXXFLAGS@ @H5_CXXFLAGS@
+CXXFLAGS = @CXXFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEBUG_PKG = @DEBUG_PKG@
 DEFAULT_API_VERSION = @DEFAULT_API_VERSION@
@@ -126,7 +133,7 @@ F9XMODEXT = @F9XMODEXT@
 F9XMODFLAG = @F9XMODFLAG@
 F9XSUFFIXFLAG = @F9XSUFFIXFLAG@
 FC = @FC@
-FCFLAGS = @FCFLAGS@ @H5_FCFLAGS@
+FCFLAGS = @FCFLAGS@
 FCFLAGS_f90 = @FCFLAGS_f90@
 FCLIBS = @FCLIBS@
 FGREP = @FGREP@
diff --git a/hl/fortran/src/Makefile.am b/hl/fortran/src/Makefile.am
index fbc3908..d4fec65 100644
--- a/hl/fortran/src/Makefile.am
+++ b/hl/fortran/src/Makefile.am
@@ -24,20 +24,20 @@ include $(top_srcdir)/config/lt_vers.am
 
 INCLUDES=-I$(top_srcdir)/src -I$(top_srcdir)/hl/src -I$(top_builddir)/hl/src \
          -I$(top_srcdir)/fortran/src -I$(top_builddir)/fortran/src
-AM_FCFLAGS=-I$(top_builddir)/fortran/src $(F9XMODFLAG)$(top_builddir)/fortran/src
+AM_FCFLAGS+=-I$(top_builddir)/fortran/src $(F9XMODFLAG)$(top_builddir)/fortran/src
 
 # Our main target, the high-level fortran library
 lib_LTLIBRARIES=libhdf5hl_fortran.la
 
 # Add libtool numbers to the HDF5 HL Fortran library (from config/lt_vers.am)
-libhdf5hl_fortran_la_LDFLAGS= -version-info $(LT_VERS_INTERFACE):$(LT_VERS_REVISION):$(LT_VERS_AGE)
+libhdf5hl_fortran_la_LDFLAGS= -version-info $(LT_VERS_INTERFACE):$(LT_VERS_REVISION):$(LT_VERS_AGE) $(AM_LDFLAGS)
 
 # Some Fortran compilers can't build shared libraries, so sometimes we
 # want to build a shared C library and a static Fortran library.  If so,
 # pass the -static flag to the library linker.
 if FORTRAN_SHARED_CONDITIONAL
 else
-   AM_LDFLAGS=-static
+   AM_LDFLAGS+=-static
 endif
 
 # Source files for the library
diff --git a/hl/fortran/src/Makefile.in b/hl/fortran/src/Makefile.in
index f934efa..c19057c 100644
--- a/hl/fortran/src/Makefile.in
+++ b/hl/fortran/src/Makefile.in
@@ -55,6 +55,11 @@ DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in \
 	$(top_srcdir)/config/commence.am \
 	$(top_srcdir)/config/conclude.am \
 	$(top_srcdir)/config/lt_vers.am
+
+# Some Fortran compilers can't build shared libraries, so sometimes we
+# want to build a shared C library and a static Fortran library.  If so,
+# pass the -static flag to the library linker.
+@FORTRAN_SHARED_CONDITIONAL_FALSE@am__append_1 = -static
 TESTS =
 subdir = hl/fortran/src
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
@@ -125,6 +130,17 @@ DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 ACLOCAL = /home1/packages/automake/automake-1.9.6/bin/aclocal-1.9 -I /afs/ncsa/projects/hdf/packages/libtool_1.5.14/Linux_2.4/share/aclocal
 ADD_PARALLEL_FILES = @ADD_PARALLEL_FILES@
 AMTAR = @AMTAR@
+
+# H5_CFLAGS holds flags that should be used when building hdf5,
+# but which should not be exported to h5cc for building other programs.
+# AM_CFLAGS is an automake construct which should be used by Makefiles 
+# instead of CFLAGS, as CFLAGS is reserved solely for the user to define.
+AM_CFLAGS = @AM_CFLAGS@ @H5_CFLAGS@
+AM_CPPFLAGS = @AM_CPPFLAGS@ @H5_CPPFLAGS@
+AM_CXXFLAGS = @AM_CXXFLAGS@ @H5_CXXFLAGS@
+AM_FCFLAGS = @AM_FCFLAGS@ @H5_FCFLAGS@ -I$(top_builddir)/fortran/src \
+	$(F9XMODFLAG)$(top_builddir)/fortran/src
+AM_LDFLAGS = @AM_LDFLAGS@ $(am__append_1)
 AM_MAKEFLAGS = @AM_MAKEFLAGS@
 AR = @AR@
 
@@ -138,21 +154,18 @@ BYTESEX = @BYTESEX@
 CC = @CC@
 CCDEPMODE = @CCDEPMODE@
 CC_VERSION = @CC_VERSION@
-
-# H5_CFLAGS holds flags that should be used as CFLAGS when building hdf5,
-# but which shouldn't be exported to h5cc for building other programs.
-CFLAGS = @CFLAGS@ @H5_CFLAGS@
+CFLAGS = @CFLAGS@
 CLEARFILEBUF = @CLEARFILEBUF@
 CODESTACK = @CODESTACK@
 CONFIG_DATE = @CONFIG_DATE@
 CONFIG_MODE = @CONFIG_MODE@
 CONFIG_USER = @CONFIG_USER@
 CPP = @CPP@
-CPPFLAGS = @CPPFLAGS@ @H5_CPPFLAGS@
+CPPFLAGS = @CPPFLAGS@
 CXX = @CXX@
 CXXCPP = @CXXCPP@
 CXXDEPMODE = @CXXDEPMODE@
-CXXFLAGS = @CXXFLAGS@ @H5_CXXFLAGS@
+CXXFLAGS = @CXXFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEBUG_PKG = @DEBUG_PKG@
 DEFAULT_API_VERSION = @DEFAULT_API_VERSION@
@@ -175,7 +188,7 @@ F9XMODEXT = @F9XMODEXT@
 F9XMODFLAG = @F9XMODFLAG@
 F9XSUFFIXFLAG = @F9XSUFFIXFLAG@
 FC = @FC@
-FCFLAGS = @FCFLAGS@ @H5_FCFLAGS@
+FCFLAGS = @FCFLAGS@
 FCFLAGS_f90 = @FCFLAGS_f90@
 FCLIBS = @FCLIBS@
 FGREP = @FGREP@
@@ -381,18 +394,12 @@ LT_VERS_AGE = 0
 INCLUDES = -I$(top_srcdir)/src -I$(top_srcdir)/hl/src -I$(top_builddir)/hl/src \
          -I$(top_srcdir)/fortran/src -I$(top_builddir)/fortran/src
 
-AM_FCFLAGS = -I$(top_builddir)/fortran/src $(F9XMODFLAG)$(top_builddir)/fortran/src
 
 # Our main target, the high-level fortran library
 lib_LTLIBRARIES = libhdf5hl_fortran.la
 
 # Add libtool numbers to the HDF5 HL Fortran library (from config/lt_vers.am)
-libhdf5hl_fortran_la_LDFLAGS = -version-info $(LT_VERS_INTERFACE):$(LT_VERS_REVISION):$(LT_VERS_AGE)
-
-# Some Fortran compilers can't build shared libraries, so sometimes we
-# want to build a shared C library and a static Fortran library.  If so,
-# pass the -static flag to the library linker.
-@FORTRAN_SHARED_CONDITIONAL_FALSE@AM_LDFLAGS = -static
+libhdf5hl_fortran_la_LDFLAGS = -version-info $(LT_VERS_INTERFACE):$(LT_VERS_REVISION):$(LT_VERS_AGE) $(AM_LDFLAGS)
 
 # Source files for the library
 #if BUILD_PARALLEL_CONDITIONAL
diff --git a/hl/fortran/test/Makefile.am b/hl/fortran/test/Makefile.am
index 9c94bed..7f149c8 100644
--- a/hl/fortran/test/Makefile.am
+++ b/hl/fortran/test/Makefile.am
@@ -21,15 +21,15 @@
 
 include $(top_srcdir)/config/commence.am
 
-AM_CPPFLAGS=-I$(top_srcdir)/src -I$(top_builddir)/src -I$(top_srcdir)/hl/src
-AM_FCFLAGS=-I$(top_builddir)/fortran/src -I$(top_builddir)/hl/fortran/src $(F9XMODFLAG)$(top_builddir)/fortran/src $(F9XMODFLAG)$(top_builddir)/hl/fortran/src
+AM_CPPFLAGS+=-I$(top_srcdir)/src -I$(top_builddir)/src -I$(top_srcdir)/hl/src
+AM_FCFLAGS+=-I$(top_builddir)/fortran/src -I$(top_builddir)/hl/fortran/src $(F9XMODFLAG)$(top_builddir)/fortran/src $(F9XMODFLAG)$(top_builddir)/hl/fortran/src
 
 # Some Fortran compilers can't build shared libraries, so sometimes we
 # need to make sure the Fortran programs link against the static version
 # of the HDF5 library.  We do this by passing the -static flag to the linker.
 if FORTRAN_SHARED_CONDITIONAL
 else
-   AM_LDFLAGS=-static
+   AM_LDFLAGS+=-static
 endif
 
 # Our main target, the test programs
diff --git a/hl/fortran/test/Makefile.in b/hl/fortran/test/Makefile.in
index 8d9a94e..f395240 100644
--- a/hl/fortran/test/Makefile.in
+++ b/hl/fortran/test/Makefile.in
@@ -53,6 +53,11 @@ host_triplet = @host@
 DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in \
 	$(top_srcdir)/config/commence.am \
 	$(top_srcdir)/config/conclude.am
+
+# Some Fortran compilers can't build shared libraries, so sometimes we
+# need to make sure the Fortran programs link against the static version
+# of the HDF5 library.  We do this by passing the -static flag to the linker.
+@FORTRAN_SHARED_CONDITIONAL_FALSE@am__append_1 = -static
 check_PROGRAMS = $(am__EXEEXT_1)
 TESTS = $(check_PROGRAMS)
 subdir = hl/fortran/test
@@ -96,6 +101,20 @@ DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 ACLOCAL = /home1/packages/automake/automake-1.9.6/bin/aclocal-1.9 -I /afs/ncsa/projects/hdf/packages/libtool_1.5.14/Linux_2.4/share/aclocal
 ADD_PARALLEL_FILES = @ADD_PARALLEL_FILES@
 AMTAR = @AMTAR@
+
+# H5_CFLAGS holds flags that should be used when building hdf5,
+# but which should not be exported to h5cc for building other programs.
+# AM_CFLAGS is an automake construct which should be used by Makefiles 
+# instead of CFLAGS, as CFLAGS is reserved solely for the user to define.
+AM_CFLAGS = @AM_CFLAGS@ @H5_CFLAGS@
+AM_CPPFLAGS = @AM_CPPFLAGS@ @H5_CPPFLAGS@ -I$(top_srcdir)/src \
+	-I$(top_builddir)/src -I$(top_srcdir)/hl/src
+AM_CXXFLAGS = @AM_CXXFLAGS@ @H5_CXXFLAGS@
+AM_FCFLAGS = @AM_FCFLAGS@ @H5_FCFLAGS@ -I$(top_builddir)/fortran/src \
+	-I$(top_builddir)/hl/fortran/src \
+	$(F9XMODFLAG)$(top_builddir)/fortran/src \
+	$(F9XMODFLAG)$(top_builddir)/hl/fortran/src
+AM_LDFLAGS = @AM_LDFLAGS@ $(am__append_1)
 AM_MAKEFLAGS = @AM_MAKEFLAGS@
 AR = @AR@
 
@@ -109,21 +128,18 @@ BYTESEX = @BYTESEX@
 CC = @CC@
 CCDEPMODE = @CCDEPMODE@
 CC_VERSION = @CC_VERSION@
-
-# H5_CFLAGS holds flags that should be used as CFLAGS when building hdf5,
-# but which shouldn't be exported to h5cc for building other programs.
-CFLAGS = @CFLAGS@ @H5_CFLAGS@
+CFLAGS = @CFLAGS@
 CLEARFILEBUF = @CLEARFILEBUF@
 CODESTACK = @CODESTACK@
 CONFIG_DATE = @CONFIG_DATE@
 CONFIG_MODE = @CONFIG_MODE@
 CONFIG_USER = @CONFIG_USER@
 CPP = @CPP@
-CPPFLAGS = @CPPFLAGS@ @H5_CPPFLAGS@
+CPPFLAGS = @CPPFLAGS@
 CXX = @CXX@
 CXXCPP = @CXXCPP@
 CXXDEPMODE = @CXXDEPMODE@
-CXXFLAGS = @CXXFLAGS@ @H5_CXXFLAGS@
+CXXFLAGS = @CXXFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEBUG_PKG = @DEBUG_PKG@
 DEFAULT_API_VERSION = @DEFAULT_API_VERSION@
@@ -146,7 +162,7 @@ F9XMODEXT = @F9XMODEXT@
 F9XMODFLAG = @F9XMODFLAG@
 F9XSUFFIXFLAG = @F9XSUFFIXFLAG@
 FC = @FC@
-FCFLAGS = @FCFLAGS@ @H5_FCFLAGS@
+FCFLAGS = @FCFLAGS@
 FCFLAGS_f90 = @FCFLAGS_f90@
 FCLIBS = @FCLIBS@
 FGREP = @FGREP@
@@ -346,13 +362,6 @@ TRACE = perl $(top_srcdir)/bin/trace
 # Temporary files.
 CHECK_CLEANFILES = *.chkexe *.chklog *.clog dsetf[1-4].h5 f1img.h5 \
 	f1tab.h5
-AM_CPPFLAGS = -I$(top_srcdir)/src -I$(top_builddir)/src -I$(top_srcdir)/hl/src
-AM_FCFLAGS = -I$(top_builddir)/fortran/src -I$(top_builddir)/hl/fortran/src $(F9XMODFLAG)$(top_builddir)/fortran/src $(F9XMODFLAG)$(top_builddir)/hl/fortran/src
-
-# Some Fortran compilers can't build shared libraries, so sometimes we
-# need to make sure the Fortran programs link against the static version
-# of the HDF5 library.  We do this by passing the -static flag to the linker.
-@FORTRAN_SHARED_CONDITIONAL_FALSE@AM_LDFLAGS = -static
 
 # Our main target, the test programs
 TEST_PROG = tstlite tstimage tsttable
diff --git a/hl/src/Makefile.am b/hl/src/Makefile.am
index 3ee186e..0eecbbb 100644
--- a/hl/src/Makefile.am
+++ b/hl/src/Makefile.am
@@ -22,13 +22,13 @@ include $(top_srcdir)/config/commence.am
 include $(top_srcdir)/config/lt_vers.am
 
 # Add include directories to the C preprocessor flags
-AM_CPPFLAGS=-I$(top_srcdir)/src
+AM_CPPFLAGS+=-I$(top_srcdir)/src
 
 # This library is our main target.
 lib_LTLIBRARIES=libhdf5_hl.la
 
 # Add libtool numbers to the HDF5 hl library (from config/lt_vers.am)
-libhdf5_hl_la_LDFLAGS= -version-info $(LT_VERS_INTERFACE):$(LT_VERS_REVISION):$(LT_VERS_AGE)
+libhdf5_hl_la_LDFLAGS= -version-info $(LT_VERS_INTERFACE):$(LT_VERS_REVISION):$(LT_VERS_AGE) $(AM_LDFLAGS)
 
 libhdf5_hl_la_SOURCES=H5DS.c H5IM.c H5LT.c H5LTanalyze.c H5LTparse.c H5PT.c H5TB.c
 
diff --git a/hl/src/Makefile.in b/hl/src/Makefile.in
index ee3d183..4a16fe0 100644
--- a/hl/src/Makefile.in
+++ b/hl/src/Makefile.in
@@ -120,6 +120,18 @@ DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 ACLOCAL = /home1/packages/automake/automake-1.9.6/bin/aclocal-1.9 -I /afs/ncsa/projects/hdf/packages/libtool_1.5.14/Linux_2.4/share/aclocal
 ADD_PARALLEL_FILES = @ADD_PARALLEL_FILES@
 AMTAR = @AMTAR@
+
+# H5_CFLAGS holds flags that should be used when building hdf5,
+# but which should not be exported to h5cc for building other programs.
+# AM_CFLAGS is an automake construct which should be used by Makefiles 
+# instead of CFLAGS, as CFLAGS is reserved solely for the user to define.
+AM_CFLAGS = @AM_CFLAGS@ @H5_CFLAGS@
+
+# Add include directories to the C preprocessor flags
+AM_CPPFLAGS = @AM_CPPFLAGS@ @H5_CPPFLAGS@ -I$(top_srcdir)/src
+AM_CXXFLAGS = @AM_CXXFLAGS@ @H5_CXXFLAGS@
+AM_FCFLAGS = @AM_FCFLAGS@ @H5_FCFLAGS@
+AM_LDFLAGS = @AM_LDFLAGS@
 AM_MAKEFLAGS = @AM_MAKEFLAGS@
 AR = @AR@
 
@@ -133,21 +145,18 @@ BYTESEX = @BYTESEX@
 CC = @CC@
 CCDEPMODE = @CCDEPMODE@
 CC_VERSION = @CC_VERSION@
-
-# H5_CFLAGS holds flags that should be used as CFLAGS when building hdf5,
-# but which shouldn't be exported to h5cc for building other programs.
-CFLAGS = @CFLAGS@ @H5_CFLAGS@
+CFLAGS = @CFLAGS@
 CLEARFILEBUF = @CLEARFILEBUF@
 CODESTACK = @CODESTACK@
 CONFIG_DATE = @CONFIG_DATE@
 CONFIG_MODE = @CONFIG_MODE@
 CONFIG_USER = @CONFIG_USER@
 CPP = @CPP@
-CPPFLAGS = @CPPFLAGS@ @H5_CPPFLAGS@
+CPPFLAGS = @CPPFLAGS@
 CXX = @CXX@
 CXXCPP = @CXXCPP@
 CXXDEPMODE = @CXXDEPMODE@
-CXXFLAGS = @CXXFLAGS@ @H5_CXXFLAGS@
+CXXFLAGS = @CXXFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEBUG_PKG = @DEBUG_PKG@
 DEFAULT_API_VERSION = @DEFAULT_API_VERSION@
@@ -170,7 +179,7 @@ F9XMODEXT = @F9XMODEXT@
 F9XMODFLAG = @F9XMODFLAG@
 F9XSUFFIXFLAG = @F9XSUFFIXFLAG@
 FC = @FC@
-FCFLAGS = @FCFLAGS@ @H5_FCFLAGS@
+FCFLAGS = @FCFLAGS@
 FCFLAGS_f90 = @FCFLAGS_f90@
 FCLIBS = @FCLIBS@
 FGREP = @FGREP@
@@ -374,14 +383,11 @@ LT_VERS_INTERFACE = 6
 LT_VERS_REVISION = 38
 LT_VERS_AGE = 0
 
-# Add include directories to the C preprocessor flags
-AM_CPPFLAGS = -I$(top_srcdir)/src
-
 # This library is our main target.
 lib_LTLIBRARIES = libhdf5_hl.la
 
 # Add libtool numbers to the HDF5 hl library (from config/lt_vers.am)
-libhdf5_hl_la_LDFLAGS = -version-info $(LT_VERS_INTERFACE):$(LT_VERS_REVISION):$(LT_VERS_AGE)
+libhdf5_hl_la_LDFLAGS = -version-info $(LT_VERS_INTERFACE):$(LT_VERS_REVISION):$(LT_VERS_AGE) $(AM_LDFLAGS)
 libhdf5_hl_la_SOURCES = H5DS.c H5IM.c H5LT.c H5LTanalyze.c H5LTparse.c H5PT.c H5TB.c
 
 # Public header files (to be installed)
diff --git a/hl/test/Makefile.am b/hl/test/Makefile.am
index d20b7d3..fc6e969 100644
--- a/hl/test/Makefile.am
+++ b/hl/test/Makefile.am
@@ -22,7 +22,7 @@
 include $(top_srcdir)/config/commence.am
 
 # Add include directories to C preprocessor flags
-AM_CPPFLAGS=-I. -I$(srcdir) -I$(top_builddir)/src -I$(top_srcdir)/src -I$(top_builddir)/test -I$(top_srcdir)/test -I$(top_srcdir)/hl/src
+AM_CPPFLAGS+=-I. -I$(srcdir) -I$(top_builddir)/src -I$(top_srcdir)/src -I$(top_builddir)/test -I$(top_srcdir)/test -I$(top_srcdir)/hl/src
 
 # The tests depend on the hdf5, hdf5 test,  and hdf5_hl libraries
 LDADD=$(LIBH5_HL) $(LIBH5TEST) $(LIBHDF5)
diff --git a/hl/test/Makefile.in b/hl/test/Makefile.in
index 29cfb11..4a5aa5b 100644
--- a/hl/test/Makefile.in
+++ b/hl/test/Makefile.in
@@ -121,6 +121,21 @@ DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 ACLOCAL = /home1/packages/automake/automake-1.9.6/bin/aclocal-1.9 -I /afs/ncsa/projects/hdf/packages/libtool_1.5.14/Linux_2.4/share/aclocal
 ADD_PARALLEL_FILES = @ADD_PARALLEL_FILES@
 AMTAR = @AMTAR@
+
+# H5_CFLAGS holds flags that should be used when building hdf5,
+# but which should not be exported to h5cc for building other programs.
+# AM_CFLAGS is an automake construct which should be used by Makefiles 
+# instead of CFLAGS, as CFLAGS is reserved solely for the user to define.
+AM_CFLAGS = @AM_CFLAGS@ @H5_CFLAGS@
+
+# Add include directories to C preprocessor flags
+AM_CPPFLAGS = @AM_CPPFLAGS@ @H5_CPPFLAGS@ -I. -I$(srcdir) \
+	-I$(top_builddir)/src -I$(top_srcdir)/src \
+	-I$(top_builddir)/test -I$(top_srcdir)/test \
+	-I$(top_srcdir)/hl/src
+AM_CXXFLAGS = @AM_CXXFLAGS@ @H5_CXXFLAGS@
+AM_FCFLAGS = @AM_FCFLAGS@ @H5_FCFLAGS@
+AM_LDFLAGS = @AM_LDFLAGS@
 AM_MAKEFLAGS = @AM_MAKEFLAGS@
 AR = @AR@
 
@@ -134,21 +149,18 @@ BYTESEX = @BYTESEX@
 CC = @CC@
 CCDEPMODE = @CCDEPMODE@
 CC_VERSION = @CC_VERSION@
-
-# H5_CFLAGS holds flags that should be used as CFLAGS when building hdf5,
-# but which shouldn't be exported to h5cc for building other programs.
-CFLAGS = @CFLAGS@ @H5_CFLAGS@
+CFLAGS = @CFLAGS@
 CLEARFILEBUF = @CLEARFILEBUF@
 CODESTACK = @CODESTACK@
 CONFIG_DATE = @CONFIG_DATE@
 CONFIG_MODE = @CONFIG_MODE@
 CONFIG_USER = @CONFIG_USER@
 CPP = @CPP@
-CPPFLAGS = @CPPFLAGS@ @H5_CPPFLAGS@
+CPPFLAGS = @CPPFLAGS@
 CXX = @CXX@
 CXXCPP = @CXXCPP@
 CXXDEPMODE = @CXXDEPMODE@
-CXXFLAGS = @CXXFLAGS@ @H5_CXXFLAGS@
+CXXFLAGS = @CXXFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEBUG_PKG = @DEBUG_PKG@
 DEFAULT_API_VERSION = @DEFAULT_API_VERSION@
@@ -171,7 +183,7 @@ F9XMODEXT = @F9XMODEXT@
 F9XMODFLAG = @F9XMODFLAG@
 F9XSUFFIXFLAG = @F9XSUFFIXFLAG@
 FC = @FC@
-FCFLAGS = @FCFLAGS@ @H5_FCFLAGS@
+FCFLAGS = @FCFLAGS@
 FCFLAGS_f90 = @FCFLAGS_f90@
 FCLIBS = @FCLIBS@
 FGREP = @FGREP@
@@ -373,9 +385,6 @@ CHECK_CLEANFILES = *.chkexe *.chklog *.clog combine_tables[1-2].h5 \
 	test_ds[1-9].h5 test_image[1-3].h5 test_lite[1-2].h5 \
 	test_table.h5 test_packet_table.h5 test_packet_compress.h5
 
-# Add include directories to C preprocessor flags
-AM_CPPFLAGS = -I. -I$(srcdir) -I$(top_builddir)/src -I$(top_srcdir)/src -I$(top_builddir)/test -I$(top_srcdir)/test -I$(top_srcdir)/hl/src
-
 # The tests depend on the hdf5, hdf5 test,  and hdf5_hl libraries
 LDADD = $(LIBH5_HL) $(LIBH5TEST) $(LIBHDF5)
 
diff --git a/hl/tools/Makefile.in b/hl/tools/Makefile.in
index cc38324..2738d84 100644
--- a/hl/tools/Makefile.in
+++ b/hl/tools/Makefile.in
@@ -111,6 +111,16 @@ am__relativize = \
 ACLOCAL = /home1/packages/automake/automake-1.9.6/bin/aclocal-1.9 -I /afs/ncsa/projects/hdf/packages/libtool_1.5.14/Linux_2.4/share/aclocal
 ADD_PARALLEL_FILES = @ADD_PARALLEL_FILES@
 AMTAR = @AMTAR@
+
+# H5_CFLAGS holds flags that should be used when building hdf5,
+# but which should not be exported to h5cc for building other programs.
+# AM_CFLAGS is an automake construct which should be used by Makefiles 
+# instead of CFLAGS, as CFLAGS is reserved solely for the user to define.
+AM_CFLAGS = @AM_CFLAGS@ @H5_CFLAGS@
+AM_CPPFLAGS = @AM_CPPFLAGS@ @H5_CPPFLAGS@
+AM_CXXFLAGS = @AM_CXXFLAGS@ @H5_CXXFLAGS@
+AM_FCFLAGS = @AM_FCFLAGS@ @H5_FCFLAGS@
+AM_LDFLAGS = @AM_LDFLAGS@
 AM_MAKEFLAGS = @AM_MAKEFLAGS@
 AR = @AR@
 
@@ -124,21 +134,18 @@ BYTESEX = @BYTESEX@
 CC = @CC@
 CCDEPMODE = @CCDEPMODE@
 CC_VERSION = @CC_VERSION@
-
-# H5_CFLAGS holds flags that should be used as CFLAGS when building hdf5,
-# but which shouldn't be exported to h5cc for building other programs.
-CFLAGS = @CFLAGS@ @H5_CFLAGS@
+CFLAGS = @CFLAGS@
 CLEARFILEBUF = @CLEARFILEBUF@
 CODESTACK = @CODESTACK@
 CONFIG_DATE = @CONFIG_DATE@
 CONFIG_MODE = @CONFIG_MODE@
 CONFIG_USER = @CONFIG_USER@
 CPP = @CPP@
-CPPFLAGS = @CPPFLAGS@ @H5_CPPFLAGS@
+CPPFLAGS = @CPPFLAGS@
 CXX = @CXX@
 CXXCPP = @CXXCPP@
 CXXDEPMODE = @CXXDEPMODE@
-CXXFLAGS = @CXXFLAGS@ @H5_CXXFLAGS@
+CXXFLAGS = @CXXFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEBUG_PKG = @DEBUG_PKG@
 DEFAULT_API_VERSION = @DEFAULT_API_VERSION@
@@ -161,7 +168,7 @@ F9XMODEXT = @F9XMODEXT@
 F9XMODFLAG = @F9XMODFLAG@
 F9XSUFFIXFLAG = @F9XSUFFIXFLAG@
 FC = @FC@
-FCFLAGS = @FCFLAGS@ @H5_FCFLAGS@
+FCFLAGS = @FCFLAGS@
 FCFLAGS_f90 = @FCFLAGS_f90@
 FCLIBS = @FCLIBS@
 FGREP = @FGREP@
diff --git a/hl/tools/gif2h5/Makefile.am b/hl/tools/gif2h5/Makefile.am
index f1cec06..895c75f 100644
--- a/hl/tools/gif2h5/Makefile.am
+++ b/hl/tools/gif2h5/Makefile.am
@@ -32,8 +32,8 @@ bin_PROGRAMS=gif2h5 h52gif
 noinst_PROGRAMS=h52gifgentst
 
 # Add h52gif and gif2h5 specific linker flags here
-h52gif_LDFLAGS = $(LT_STATIC_EXEC)
-gif2h5_LDFLAGS = $(LT_STATIC_EXEC)
+h52gif_LDFLAGS = $(LT_STATIC_EXEC) $(AM_LDFLAGS)
+gif2h5_LDFLAGS = $(LT_STATIC_EXEC) $(AM_LDFLAGS)
 
 gif2h5_SOURCES=gif2hdf.c gif2mem.c decompress.c gifread.c writehdf.c 
 
diff --git a/hl/tools/gif2h5/Makefile.in b/hl/tools/gif2h5/Makefile.in
index 71a16c4..e43dd07 100644
--- a/hl/tools/gif2h5/Makefile.in
+++ b/hl/tools/gif2h5/Makefile.in
@@ -111,6 +111,16 @@ DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 ACLOCAL = /home1/packages/automake/automake-1.9.6/bin/aclocal-1.9 -I /afs/ncsa/projects/hdf/packages/libtool_1.5.14/Linux_2.4/share/aclocal
 ADD_PARALLEL_FILES = @ADD_PARALLEL_FILES@
 AMTAR = @AMTAR@
+
+# H5_CFLAGS holds flags that should be used when building hdf5,
+# but which should not be exported to h5cc for building other programs.
+# AM_CFLAGS is an automake construct which should be used by Makefiles 
+# instead of CFLAGS, as CFLAGS is reserved solely for the user to define.
+AM_CFLAGS = @AM_CFLAGS@ @H5_CFLAGS@
+AM_CPPFLAGS = @AM_CPPFLAGS@ @H5_CPPFLAGS@
+AM_CXXFLAGS = @AM_CXXFLAGS@ @H5_CXXFLAGS@
+AM_FCFLAGS = @AM_FCFLAGS@ @H5_FCFLAGS@
+AM_LDFLAGS = @AM_LDFLAGS@
 AM_MAKEFLAGS = @AM_MAKEFLAGS@
 AR = @AR@
 
@@ -124,21 +134,18 @@ BYTESEX = @BYTESEX@
 CC = @CC@
 CCDEPMODE = @CCDEPMODE@
 CC_VERSION = @CC_VERSION@
-
-# H5_CFLAGS holds flags that should be used as CFLAGS when building hdf5,
-# but which shouldn't be exported to h5cc for building other programs.
-CFLAGS = @CFLAGS@ @H5_CFLAGS@
+CFLAGS = @CFLAGS@
 CLEARFILEBUF = @CLEARFILEBUF@
 CODESTACK = @CODESTACK@
 CONFIG_DATE = @CONFIG_DATE@
 CONFIG_MODE = @CONFIG_MODE@
 CONFIG_USER = @CONFIG_USER@
 CPP = @CPP@
-CPPFLAGS = @CPPFLAGS@ @H5_CPPFLAGS@
+CPPFLAGS = @CPPFLAGS@
 CXX = @CXX@
 CXXCPP = @CXXCPP@
 CXXDEPMODE = @CXXDEPMODE@
-CXXFLAGS = @CXXFLAGS@ @H5_CXXFLAGS@
+CXXFLAGS = @CXXFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEBUG_PKG = @DEBUG_PKG@
 DEFAULT_API_VERSION = @DEFAULT_API_VERSION@
@@ -161,7 +168,7 @@ F9XMODEXT = @F9XMODEXT@
 F9XMODFLAG = @F9XMODFLAG@
 F9XSUFFIXFLAG = @F9XSUFFIXFLAG@
 FC = @FC@
-FCFLAGS = @FCFLAGS@ @H5_FCFLAGS@
+FCFLAGS = @FCFLAGS@
 FCFLAGS_f90 = @FCFLAGS_f90@
 FCLIBS = @FCLIBS@
 FGREP = @FGREP@
@@ -367,8 +374,8 @@ TEST_SCRIPT = $(srcdir)/h52giftest.sh
 check_SCRIPTS = $(TEST_SCRIPT)
 
 # Add h52gif and gif2h5 specific linker flags here
-h52gif_LDFLAGS = $(LT_STATIC_EXEC)
-gif2h5_LDFLAGS = $(LT_STATIC_EXEC)
+h52gif_LDFLAGS = $(LT_STATIC_EXEC) $(AM_LDFLAGS)
+gif2h5_LDFLAGS = $(LT_STATIC_EXEC) $(AM_LDFLAGS)
 gif2h5_SOURCES = gif2hdf.c gif2mem.c decompress.c gifread.c writehdf.c 
 h52gif_SOURCES = hdf2gif.c hdfgifwr.c 
 h52gifgentst_SOURCES = h52gifgentst.c