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-rw-r--r--config/cmake_ext_mod/ConfigureChecks.cmake33
1 files changed, 17 insertions, 16 deletions
diff --git a/config/cmake_ext_mod/ConfigureChecks.cmake b/config/cmake_ext_mod/ConfigureChecks.cmake
index fd502e5..c4fabf1 100644
--- a/config/cmake_ext_mod/ConfigureChecks.cmake
+++ b/config/cmake_ext_mod/ConfigureChecks.cmake
@@ -262,27 +262,23 @@ set (LINUX_LFS 0)
set (HDF_EXTRA_C_FLAGS)
set (HDF_EXTRA_FLAGS)
if (NOT WINDOWS)
- if (NOT ${HDF_PREFIX}_HAVE_SOLARIS)
+ # Might want to check explicitly for Linux and possibly Cygwin
+ # instead of checking for not Solaris or Darwin.
+ if (NOT ${HDF_PREFIX}_HAVE_SOLARIS AND NOT ${HDF_PREFIX}_HAVE_DARWIN)
# Linux Specific flags
# 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
- set (HDF_EXTRA_C_FLAGS -D_POSIX_C_SOURCE=199506L)
- # _BSD_SOURCE deprecated in GLIBC >= 2.20
- TRY_RUN (HAVE_DEFAULT_SOURCE_RUN HAVE_DEFAULT_SOURCE_COMPILE
- ${CMAKE_BINARY_DIR}
- ${HDF_RESOURCES_EXT_DIR}/HDFTests.c
- CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=-DHAVE_DEFAULT_SOURCE
- OUTPUT_VARIABLE OUTPUT
- )
- if (HAVE_DEFAULT_SOURCE_COMPILE AND HAVE_DEFAULT_SOURCE_RUN)
- set (HDF_EXTRA_FLAGS -D_DEFAULT_SOURCE)
- else (HAVE_DEFAULT_SOURCE_COMPILE AND HAVE_DEFAULT_SOURCE_RUN)
- set (HDF_EXTRA_FLAGS -D_BSD_SOURCE)
- endif (HAVE_DEFAULT_SOURCE_COMPILE AND HAVE_DEFAULT_SOURCE_RUN)
+ set (HDF_EXTRA_C_FLAGS -D_POSIX_C_SOURCE=200112L)
+
+ # 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)
option (HDF_ENABLE_LARGE_FILE "Enable support for large (64-bit) files on Linux." ON)
if (HDF_ENABLE_LARGE_FILE)
@@ -293,6 +289,11 @@ if (NOT WINDOWS)
CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=-DTEST_LFS_WORKS
OUTPUT_VARIABLE OUTPUT
)
+
+ # The LARGEFILE definitions were from the transition period
+ # and are probably no longer needed. The FILE_OFFSET_BITS
+ # check should be generalized for all POSIX systems as it
+ # is in the Autotools.
if (TEST_LFS_WORKS_COMPILE)
if (TEST_LFS_WORKS_RUN MATCHES 0)
set (TEST_LFS_WORKS 1 CACHE INTERNAL ${msg})
@@ -315,7 +316,7 @@ if (NOT WINDOWS)
endif (TEST_LFS_WORKS_COMPILE)
endif (HDF_ENABLE_LARGE_FILE)
set (CMAKE_REQUIRED_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} ${HDF_EXTRA_FLAGS})
- endif (NOT ${HDF_PREFIX}_HAVE_SOLARIS)
+ endif (NOT ${HDF_PREFIX}_HAVE_SOLARIS AND NOT ${HDF_PREFIX}_HAVE_DARWIN)
endif (NOT WINDOWS)
add_definitions (${HDF_EXTRA_FLAGS})