[svn-r1117] Changes since 19990303

----------------------

./configure.in
./configure		[REGENERATED]
	The path for a command is calculated explicitly the hard way
	because `type -path' isn't portable.

./config/freebsd
./config/linux-gnu
./config/linux-gnulibc2
	Changed the way files reference each other.

./config/gnu-flags	[NEW]
./config/dec-flags	[NEW]
	These files figure out what flags to pass to certain compilers
	so we can reuse code in more than one config/* file.  They
	also have better warning messages when old compilers are used.

./config/linux-gnulibc1
./config/dec-osf4.x
	These files use the new *-flags files.


./src/H5D.c
./src/H5Onull.c
./src/H5Tconv.c
./tools/h5ls.c
	Fixed a compiler warning.

./src/H5detect.c
	Added a better comment to the top of the generated file.

7 files changed, 241 insertions, 169 deletions

diff --git a/config/dec-flags b/config/dec-flags
new file mode 100644
index 0000000..edb6695
--- /dev/null
+++ b/config/dec-flags
@@ -0,0 +1,62 @@
+#							-*- shell-script -*-
+#
+# This file should be sourced into configure if the compiler is a DEC
+# compiler.  It is careful not to do anything if the compiler is not
+# DEC; otherwise `cc_flags_set' is set to `yes'
+#
+
+# Get the compiler version unless it's already known.
+#
+#   cc_vendor:    The compiler vendor: DEC
+#   cc_version:   Version number, like: V5.2-038
+#
+if test X = "X$cc_flags_set"; then
+    cc_vendor=DEC
+    cc_version="`$CC $CFLAGS -V 2>&1 |head -1 |\
+	        sed 's/.*DEC C \(V[0-9][-\.0-9]*\).*/\1/'`"
+    if test X != "$gcc_version"; then
+	echo "compiler '$CC' is $cc_vendor-$cc_version"
+    else
+        cc_vendor=
+    fi
+fi
+
+# Warn about old compilers that don't work right.
+case "$cc_vendor-$cc_version" in
+    DEC-V5.2-038)
+        cat <<EOF
+    **
+    ** This compiler may generate incorrect code when optimizations are
+    ** enabled. Please upgrade to at newer version (we're not sure which
+    ** version actually works) before reporting bugs to the HDF5 team.
+    **
+EOF
+	sleep 5
+	;;
+esac
+
+# Compiler flags
+case "$cc_vendor-$cc_version" in
+    DEC-V5.*)
+	# Production
+	PROD_CFLAGS="-g0 -verbose -warnprotos -std -O4 $ARCH -ansi_args -fp_reorder -readonly_strings -inline speed"
+	PROD_CPPFLAGS="-D_INTRINSICS -D_INLINE_INTRINSICS"
+
+	# Debug
+	DEBUG_CFLAGS="-g -std -verbose -warnprotos"
+	DEBUG_CPPFLAGS="-DH5F_OPT_SEEK=0 -DH5F_LOW_DFLT=H5F_LOW_SEC2"
+
+	# Profile
+	PROFILE_CFLAGS="-pg -std -verbose -warnprotos"
+	PROFILE_CPPFLAGS=
+
+	# Flags are set
+	cc_flags_set=yes
+	;;
+esac
+
+# If no flags were set then clear the compiler vendor and version info.
+if test X = "X$cc_flags_set"; then
+    cc_vendor=
+    cc_version=
+fi
diff --git a/config/dec-osf4.x b/config/dec-osf4.x
index 474e717..c16f212 100644
--- a/config/dec-osf4.x
+++ b/config/dec-osf4.x
@@ -6,50 +6,15 @@
 #
 # See BlankForm in this directory for detailed information.
 
-
-
 # The default compiler is `cc'
 if test "X-" =  "X-$CC"; then
     CC=cc
     CC_BASENAME=cc
 fi
 
-# Compiler flags
-case "X-$CC_BASENAME" in
-    X-gcc)
-	CFLAGS="$CFLAGS -Wsign-compare" #Only works for some versions
-	DEBUG_CFLAGS="-g -fverbose-asm"
-	DEBUG_CPPFLAGS="-DH5F_OPT_SEEK=0 -DH5F_LOW_DFLT=H5F_LOW_SEC2"
-	PROD_CFLAGS="-O3"
-	PROD_CPPFLAGS=
-	PROFILE_CFLAGS="-pg"
-	PROFILE_CPPFLAGS=
-	;;
-
-    *)
-        # Watch out for some versions of the compiler
-        case "`($CC -V |head -1) 2>/dev/null`" in
-	    "DEC C V5.2-038 "*)
-		echo "  +------------------------------------------------+"
-		echo "  | You have an old version of cc. Please upgrade. |"
-		echo "  | Continuing anyway, but code generation might be|"
-		echo "  | incorrect, especially if optimizations are     |"
-		echo "  | enabled (look for -O)                          |"
-		echo "  +------------------------------------------------+"
-		sleep 5
-		;;
-	esac
-
-	# Debugging
-	DEBUG_CFLAGS="-g -std -verbose -warnprotos"
-	DEBUG_CPPFLAGS="-DH5F_OPT_SEEK=0 -DH5F_LOW_DFLT=H5F_LOW_SEC2"
-
-	# Production
-	PROD_CFLAGS="-g0 -verbose -warnprotos -std -O4 -arch host -tune host -ansi_args -fp_reorder -readonly_strings -inline speed"
-	PROD_CPPFLAGS="-D_INTRINSICS -D_INLINE_INTRINSICS"
+# Architecture dependent flags
+ARCH=${ARCH:='-arch host -tune host'}
 
-	# Profiling
-	PROFILE_CFLAGS="-pg -std -verbose -warnprotos"
-	PROFILE_CPPFLAGS=
-	;;
-esac
+# Try compiler flags.
+. ./config/gnu-flags
+. ./config/dec-flags
diff --git a/config/freebsd b/config/freebsd
index 96d918e..4d9d221 100644
--- a/config/freebsd
+++ b/config/freebsd
@@ -5,4 +5,17 @@
 #
 # See BlankForm in this directory for details.
 
-. config/linux-gnulibc1
+# The default compiler is `gcc'
+if test "X-" = "X-$CC"; then
+    CC=gcc
+    CC_BASENAME=gcc
+fi
+
+# Architecture-specific flags
+ARCH=
+
+# Omit frame pointer for optimized code?
+NOFP=${NOFP:=-fomit-frame-pointer}
+
+# Figure out compiler flags
+. ./config/gnu-flags
diff --git a/config/gnu-flags b/config/gnu-flags
new file mode 100644
index 0000000..83c0ed7
--- /dev/null
+++ b/config/gnu-flags
@@ -0,0 +1,149 @@
+#							-*- shell-script -*-
+#
+# This file should be sourced into configure if the compiler is the
+# GNU gcc compiler or a derivative.  It is careful not to do anything
+# if the compiler is not GNU; otherwise `cc_flags_set' is set to `yes'
+#
+
+# Get the compiler version in a way that works for gcc, egcs, and
+# pgcc unless a compiler version is already known
+#
+#   cc_vendor:    The compiler name: gcc, egcs, or pgcc
+#   cc_version:   Version number: 2.91.60, 2.7.2.1
+#
+if test X = "X$cc_flags_set"; then
+    cc_version="`$CC $CFLAGS -v 2>&1 |grep 'gcc version' |\
+	        sed 's/.*gcc version \([-a-z0-9\.]*\).*/\1/'`"
+    cc_vendor=`echo $cc_version |sed 's/\([a-z]*\).*/\1/'`
+    cc_version=`echo $cc_version |sed 's/[-a-z]//g'`
+    if test X = "X$cc_vendor" -a X != "X$cc_version"; then
+	cc_vendor=gcc
+    fi
+    if test "-" != "$cc_vendor-$cc_version"; then
+	echo "compiler '$CC' is GNU $cc_vendor-$cc_version"
+    fi
+fi
+
+# Warn about old GNU compilers that don't work right.
+case "$cc_vendor-$cc_version" in
+    gcc-2.7.*)
+	cat <<EOF
+    **
+    ** This compiler may be unable to properly compile the long long
+    ** data type used extensively by hdf5, although specifying
+    ** --disable-hsizet for configure may work around those bugs.
+    ** There may be other code generation problems also, especially
+    ** when optimizations are enabled.  Please upgrade to at least GNU
+    ** gcc version 2.8.1 before reporting bugs to the HDF5 team.
+    **
+EOF
+	sleep 5
+	;;
+	    
+    pgcc-2.*)
+        v2=`echo $cc_version |cut -f2 -d.`
+	v3=`echo $cc_version |cut -f3 -d.`
+	v=`expr $v2 '*' 1000 + $v3`
+	if test $v -lt 91060; then
+	    cat <<EOF
+    **
+    ** This compiler may have problems allocating registers for long
+    ** long data types when optimizations are enabled. There may be
+    ** other code generation problems as well. Please upgrade to at
+    ** least pgcc-2.91.60 (egcs-1.1.1) before reporting bugs to the
+    ** HDF5 team.
+    **
+EOF
+	    sleep 5
+	fi
+	;;
+esac
+
+# Compiler flags
+case "$cc_vendor-$cc_version" in
+    gcc-2.7*)
+	# General
+	CFLAGS="$CFLAGS -ansi"
+
+	# Production
+	PROC_CFLAGS="-O3 $NOFP -finline-functions -Wno-shadow"
+	PROD_CPPFLAGS=
+
+	# Debug
+	DEBUG_CFLAGS="-g -fverbose-asm -Wno-shadow"
+	DEBUG_CPPFLAGS="-DH5F_OPT_SEEK=0 -DH5F_LOW_DFLT=H5F_LOW_SEC2"
+
+	# Profile
+	PROFILE_CFLAGS=-pg
+	PROFILE_CPPFLAGS=
+
+	# Flags are set
+	cc_flags_set=yes
+	;;
+
+    gcc-2.8.*)
+        # General
+        CFLAGS="$CFLAGS -Wsign-compare"
+
+	# Production
+	PROD_CFLAGS="$ARCH -O3 $NOFP -finline-functions -fschedule-insns2 -Wno-shadow"
+	PROD_CPPFLAGS=
+
+	# Debug
+	DEBUG_CFLAGS="-g -fverbose-asm -Wno-shadow"
+	DEBUG_CPPFLAGS="-DH5F_OPT_SEEK=0 -DH5F_LOW_DFLT=H5F_LOW_SEC2"
+
+	# Profile
+	PROFILE_CFLAGS=-pg
+	PROFILE_CPPFLAGS=
+
+	# Flags are set
+	cc_flags_set=yes
+	;;
+
+    egcs-2.*|pgcc-2.*)
+	# General
+	CFLAGS="$CFLAGS -Wsign-compare"
+
+	# Production
+	PROD_CFLAGS="$ARCH -O6 $NOFP -Wno-shadow"
+	PROD_CPPFLAGS=
+
+	# Debug
+	DEBUG_CFLAGS="-g -fverbose-asm -Wno-shadow"
+	DEBUG_CPPFLAGS="-DH5F_OPT_SEEK=0 -DH5F_LOW_DFLT=H5F_LOW_SEC2"
+
+	# Profile
+	PROFILE_CFLAGS=-pg
+	PROFILE_CPPFLAGS=
+
+	# Flags are set
+	cc_flags_set=yes
+	;;
+
+    gcc-*|egcs-*|pgcc-*)
+        # This must be some other GNU compiler that we don't know about.
+        # Just use fairly generic flags.
+
+	# Production
+	PROD_CFLAGS=-O
+	PROD_CPPFLAGS=
+
+	# Debug
+	DEBUG_CFLAGS=-g
+	DEBUG_CPPFLAGS="-DH5F_OPT_SEEK=0 -DH5F_LOW_DFLT=H5F_LOW_SEC2"
+
+	# Profile
+	PROFILE_CFLAGS=-pg
+	PROFILE_CPPFLAGS=
+
+	# Flags are set
+	cc_flags_set=yes
+	;;
+esac
+
+# Clear cc info if no flags set
+if test X = "X$cc_flags_set"; then
+    cc_vendor=
+    cc_version=
+fi
\ No newline at end of file
diff --git a/config/linux-gnu b/config/linux-gnu
index 8a57bd5..99335aa 100644
--- a/config/linux-gnu
+++ b/config/linux-gnu
@@ -1 +1,4 @@
+#							-*- shell-script -*-
+# This is the same as linux-gnulibc1
+
 . config/linux-gnulibc1
diff --git a/config/linux-gnulibc1 b/config/linux-gnulibc1
index f314915..83389b0 100644
--- a/config/linux-gnulibc1
+++ b/config/linux-gnulibc1
@@ -12,65 +12,11 @@ if test "X-" =  "X-$CC"; then
     CC_BASENAME=gcc
 fi
 
-ARCH="-mcpu=pentiumpro -march=pentiumpro -malign-double"
-NOFP="-fomit-frame-pointer"
-#HDF4_FLAGS="-D__i386"
+# Architecture-specific flags
+ARCH=${ARCH:="-mcpu=pentiumpro -march=pentiumpro -malign-double"}
 
-# Compiler flags.  We use `-v' to get the version number because it almost
-# always works on Linux systems.
-case `$CC -v 2>&1 |grep 'gcc version' |sed 's/.*gcc version //'` in
-    2.7.*)
-        echo "  +------------------------------------------------+"
-        echo "  | You have an old version of gcc. Please upgrade |"
-        echo "  | to 2.8.1 or better.  Continuing anyway, but    |"
-        echo "  | code generation may be wrong on some platforms.|"
-        echo "  +------------------------------------------------+"
-        sleep 5
-	CFLAGS="$CFLAGS -ansi"
-	PROD_CFLAGS="-O3 $NOFP -finline-functions -Wno-shadow"
-	PROD_CPPFLAGS="$HDF4_FLAGS"
-	DEBUG_CFLAGS="-g -fverbose-asm -Wno-shadow"
-	DEBUG_CPPFLAGS="$HDF4_FLAGS -DH5F_OPT_SEEK=0 -DH5F_LOW_DFLT=H5F_LOW_SEC2"
-	PROFILE_CFLAGS=-pg
-	PROFILE_CPPFLAGS=
-	;;
+# Omit frame pointer for optimized code?
+NOFP=${NOFP:=-fomit-frame-pointer}
 
-    2.8.*)
-	CFLAGS="$CFLAGS -Wsign-compare"
-	PROD_CFLAGS="$ARCH -O3 $NOFP -finline-functions -fschedule-insns2 -Wno-shadow"
-	PROD_CPPFLAGS="$HDF4_FLAGS"
-	DEBUG_CFLAGS="-g -fverbose-asm -Wno-shadow"
-	DEBUG_CPPFLAGS="$HDF4_FLAGS -DH5F_OPT_SEEK=0 -DH5F_LOW_DFLT=H5F_LOW_SEC2"
-	PROFILE_CFLAGS=-pg
-	PROFILE_CPPFLAGS=
-	;;
-
-    egcs-*)
-	CFLAGS="$CFLAGS -Wsign-compare"
-	PROD_CFLAGS="$ARCH -O6 $NOFP -Wno-shadow"
-	PROD_CPPFLAGS="$HDF4_FLAGS"
-	DEBUG_CFLAGS="-g -fverbose-asm -Wno-shadow"
-	DEBUG_CPPFLAGS="$HDF4_FLAGS -DH5F_OPT_SEEK=0 -DH5F_LOW_DFLT=H5F_LOW_SEC2"
-	PROFILE_CFLAGS=-pg
-	PROFILE_CPPFLAGS=
-	;;
-
-    pgcc-*)
-	CFLAGS="$CFLAGS -Wsign-compare"
-	PROD_CFLAGS="$ARCH -O6 $NOFP -Wno-shadow"
-	PROD_CPPFLAGS="$HDF4_FLAGS"
-	DEBUG_CFLAGS="-g -fverbose-asm -Wno-shadow"
-	DEBUG_CPPFLAGS="$HDF4_FLAGS -DH5F_OPT_SEEK=0 -DH5F_LOW_DFLT=H5F_LOW_SEC2"
-	PROFILE_CFLAGS=-pg
-	PROFILE_CPPFLAGS=
-	;;
-
-    *)
-	PROD_CFLAGS=-O
-	PROD_CPPFLAGS="$HDF4_FLAGS"
-	DEBUG_CFLAGS="-g"
-	DEBUG_CPPFLAGS="$HDF4_FLAGS -DH5F_OPT_SEEK=0 -DH5F_LOW_DFLT=H5F_LOW_SEC2"
-	PROFILE_CFLAGS=-pg
-	PROFILE_CPPFLAGS=
-	;;
-esac
+# Figure out compiler flags
+. ./config/gnu-flags
diff --git a/config/linux-gnulibc2 b/config/linux-gnulibc2
index f314915..67bdfdd 100644
--- a/config/linux-gnulibc2
+++ b/config/linux-gnulibc2
@@ -6,71 +6,5 @@
 #
 # See BlankForm in this directory for details.
 
-# The default compiler is `gcc'.
-if test "X-" =  "X-$CC"; then
-    CC=gcc
-    CC_BASENAME=gcc
-fi
-
-ARCH="-mcpu=pentiumpro -march=pentiumpro -malign-double"
-NOFP="-fomit-frame-pointer"
-#HDF4_FLAGS="-D__i386"
-
-# Compiler flags.  We use `-v' to get the version number because it almost
-# always works on Linux systems.
-case `$CC -v 2>&1 |grep 'gcc version' |sed 's/.*gcc version //'` in
-    2.7.*)
-        echo "  +------------------------------------------------+"
-        echo "  | You have an old version of gcc. Please upgrade |"
-        echo "  | to 2.8.1 or better.  Continuing anyway, but    |"
-        echo "  | code generation may be wrong on some platforms.|"
-        echo "  +------------------------------------------------+"
-        sleep 5
-	CFLAGS="$CFLAGS -ansi"
-	PROD_CFLAGS="-O3 $NOFP -finline-functions -Wno-shadow"
-	PROD_CPPFLAGS="$HDF4_FLAGS"
-	DEBUG_CFLAGS="-g -fverbose-asm -Wno-shadow"
-	DEBUG_CPPFLAGS="$HDF4_FLAGS -DH5F_OPT_SEEK=0 -DH5F_LOW_DFLT=H5F_LOW_SEC2"
-	PROFILE_CFLAGS=-pg
-	PROFILE_CPPFLAGS=
-	;;
-
-    2.8.*)
-	CFLAGS="$CFLAGS -Wsign-compare"
-	PROD_CFLAGS="$ARCH -O3 $NOFP -finline-functions -fschedule-insns2 -Wno-shadow"
-	PROD_CPPFLAGS="$HDF4_FLAGS"
-	DEBUG_CFLAGS="-g -fverbose-asm -Wno-shadow"
-	DEBUG_CPPFLAGS="$HDF4_FLAGS -DH5F_OPT_SEEK=0 -DH5F_LOW_DFLT=H5F_LOW_SEC2"
-	PROFILE_CFLAGS=-pg
-	PROFILE_CPPFLAGS=
-	;;
-
-    egcs-*)
-	CFLAGS="$CFLAGS -Wsign-compare"
-	PROD_CFLAGS="$ARCH -O6 $NOFP -Wno-shadow"
-	PROD_CPPFLAGS="$HDF4_FLAGS"
-	DEBUG_CFLAGS="-g -fverbose-asm -Wno-shadow"
-	DEBUG_CPPFLAGS="$HDF4_FLAGS -DH5F_OPT_SEEK=0 -DH5F_LOW_DFLT=H5F_LOW_SEC2"
-	PROFILE_CFLAGS=-pg
-	PROFILE_CPPFLAGS=
-	;;
-
-    pgcc-*)
-	CFLAGS="$CFLAGS -Wsign-compare"
-	PROD_CFLAGS="$ARCH -O6 $NOFP -Wno-shadow"
-	PROD_CPPFLAGS="$HDF4_FLAGS"
-	DEBUG_CFLAGS="-g -fverbose-asm -Wno-shadow"
-	DEBUG_CPPFLAGS="$HDF4_FLAGS -DH5F_OPT_SEEK=0 -DH5F_LOW_DFLT=H5F_LOW_SEC2"
-	PROFILE_CFLAGS=-pg
-	PROFILE_CPPFLAGS=
-	;;
-
-    *)
-	PROD_CFLAGS=-O
-	PROD_CPPFLAGS="$HDF4_FLAGS"
-	DEBUG_CFLAGS="-g"
-	DEBUG_CPPFLAGS="$HDF4_FLAGS -DH5F_OPT_SEEK=0 -DH5F_LOW_DFLT=H5F_LOW_SEC2"
-	PROFILE_CFLAGS=-pg
-	PROFILE_CPPFLAGS=
-	;;
-esac
+# Same as with gnulibc1 for now
+. ./config/linux-gnulibc1