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authorDana Robinson <derobins@hdfgroup.org>2015-01-27 03:31:03 (GMT)
committerDana Robinson <derobins@hdfgroup.org>2015-01-27 03:31:03 (GMT)
commitb10f26ab1801d5ac152c8396b9226ec4fafe6797 (patch)
tree12ea17210020effdfba6de374c44214544b5875e /configure.ac
parent4e37d30dbaa04b907cf05a6ec7ffe9df3abcfb62 (diff)
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[svn-r26042] Updated configure.ac so that POSIX_C_SOURCE=200112L and GNU_SOURCE
are defined. The former is for posix_memalign() and the latter for the O_DIRECT flag for open(). Both are for direct VFD support. Fixes HDFFV-9088 Tested on: jam
Diffstat (limited to 'configure.ac')
-rw-r--r--configure.ac13
1 files changed, 11 insertions, 2 deletions
diff --git a/configure.ac b/configure.ac
index d7804a6..e7bbda5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1479,19 +1479,28 @@ case "$host_cpu-$host_vendor-$host_os" in
## Add POSIX support on Linux systems, so <features.h> defines
## __USE_POSIX, which is required to get the prototype for fdopen
## defined correctly in <stdio.h>.
+ ##
## This flag was removed from h5cc as of 2009-10-17 when it was found
## that the flag broke compiling netCDF-4 code with h5cc, but kept in
## H5_CPPFLAGS because fdopen and HDfdopen fail without it. HDfdopen
## is used only by H5_debug_mask which is used only when debugging in
## H5_init_library (all in H5.c). When the flag was removed this was
## the only compile failure noted.
+ ##
## This was originally defined as _POSIX_SOURCE which was updated to
## _POSIX_C_SOURCE=199506L to expose a greater amount of POSIX
## functionality so clock_gettime and CLOCK_MONOTONIC are defined
- ## correctly.
+ ## correctly. This was later updated to 200112L so that
+ ## posix_memalign() is visible for the direct VFD code on Linux
+ ## systems.
+ ##
## POSIX feature information can be found in the gcc manual at:
## http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
- H5_CPPFLAGS="-D_POSIX_C_SOURCE=199506L $H5_CPPFLAGS"
+ H5_CPPFLAGS="-D_POSIX_C_SOURCE=200112L $H5_CPPFLAGS"
+
+ ## Need to add this so that O_DIRECT is visible for the direct
+ ## VFD on Linux systems.
+ AM_CPPFLAGS="-D_GNU_SOURCE $AM_CPPFLAGS"
## Also add BSD support on Linux systems, so <features.h> defines
## __USE_BSD, which is required to get the prototype for strdup