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-rw-r--r--config/cmake_ext_mod/ConfigureChecks.cmake4
1 files changed, 2 insertions, 2 deletions
diff --git a/config/cmake_ext_mod/ConfigureChecks.cmake b/config/cmake_ext_mod/ConfigureChecks.cmake
index 33d4d6e..93b977e 100644
--- a/config/cmake_ext_mod/ConfigureChecks.cmake
+++ b/config/cmake_ext_mod/ConfigureChecks.cmake
@@ -274,11 +274,11 @@ if (MINGW OR NOT WINDOWS)
# 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
- set (HDF_EXTRA_C_FLAGS -D_POSIX_C_SOURCE=200112L)
+ set (HDF_EXTRA_C_FLAGS -D_POSIX_C_SOURCE=200809L)
# Need to add this so that O_DIRECT is visible for the direct
# VFD on Linux systems.
- set (HDF_EXTRA_C_FLAGS -D_GNU_SOURCE)
+ set (HDF_EXTRA_C_FLAGS ${HDF_EXTRA_C_FLAGS} -D_GNU_SOURCE)
option (HDF_ENABLE_LARGE_FILE "Enable support for large (64-bit) files on Linux." ON)
if (HDF_ENABLE_LARGE_FILE AND NOT DEFINED TEST_LFS_WORKS_RUN)