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Clean up CMake direct VFD handling #4161

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merged 4 commits into from
Mar 19, 2024
Merged

Clean up CMake direct VFD handling #4161

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c2577dd
Clean up CMake direct VFD handling
derobins Mar 16, 2024
a380be7
CMake tweaks
derobins Mar 16, 2024
a782cb7
Why is the CMake indent 2?
derobins Mar 16, 2024
b64e82b
CMake docs say to prefer CHECK_SYMBOL_EXISTS
derobins Mar 16, 2024
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48 changes: 15 additions & 33 deletions config/cmake/ConfigureChecks.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -653,38 +653,20 @@ unset (CMAKE_EXTRA_INCLUDE_FILES)
#-----------------------------------------------------------------------------

#-----------------------------------------------------------------------------
# Check if Direct I/O driver works
#-----------------------------------------------------------------------------
if (NOT WINDOWS)
option (HDF5_ENABLE_DIRECT_VFD "Build the Direct I/O Virtual File Driver" OFF)
if (HDF5_ENABLE_DIRECT_VFD)
set (msg "Performing TEST_DIRECT_VFD_WORKS")
set (MACRO_CHECK_FUNCTION_DEFINITIONS "-DTEST_DIRECT_VFD_WORKS -D_GNU_SOURCE ${CMAKE_REQUIRED_FLAGS}")
TRY_RUN (TEST_DIRECT_VFD_WORKS_RUN TEST_DIRECT_VFD_WORKS_COMPILE
${CMAKE_BINARY_DIR}
${HDF_RESOURCES_DIR}/HDFTests.c
CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
OUTPUT_VARIABLE OUTPUT
)
if (TEST_DIRECT_VFD_WORKS_COMPILE)
if (TEST_DIRECT_VFD_WORKS_RUN EQUAL "0")
HDF_FUNCTION_TEST (HAVE_DIRECT)
set (CMAKE_REQUIRED_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS} -D_GNU_SOURCE")
add_definitions ("-D_GNU_SOURCE")
else ()
set (TEST_DIRECT_VFD_WORKS "" CACHE INTERNAL ${msg})
message (VERBOSE "${msg}... no")
file (APPEND ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeError.log
"Test TEST_DIRECT_VFD_WORKS Run failed with the following output and exit code:\n ${OUTPUT}\n"
)
endif ()
else ()
set (TEST_DIRECT_VFD_WORKS "" CACHE INTERNAL ${msg})
message (VERBOSE "${msg}... no")
file (APPEND ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeError.log
"Test TEST_DIRECT_VFD_WORKS Compile failed with the following output:\n ${OUTPUT}\n"
)
endif ()
# Check whether we can build the direct VFD
#-----------------------------------------------------------------------------
option (HDF5_ENABLE_DIRECT_VFD "Build the Direct I/O Virtual File Driver" OFF)
if (HDF5_ENABLE_DIRECT_VFD)
# The direct VFD is tied to POSIX direct I/O as enabled by the O_DIRECT
# flag. No other form of direct I/O is supported. This feature also
# requires posix_memalign().
CHECK_SYMBOL_EXISTS (O_DIRECT "fcntl.h" HAVE_O_DIRECT)
CHECK_SYMBOL_EXISTS (posix_memalign "stdlib.h" HAVE_POSIX_MEMALIGN)

if (HAVE_O_DIRECT AND HAVE_POSIX_MEMALIGN)
set (${HDF_PREFIX}_HAVE_DIRECT 1)
else ()
message (FATAL_ERROR "The direct VFD was requested but cannot be built.\nIt requires O_DIRECT flag support and posix_memalign()")
endif ()
endif ()

Expand All @@ -705,7 +687,7 @@ option (HDF5_ENABLE_ROS3_VFD "Build the ROS3 Virtual File Driver" OFF)
endif ()

# ----------------------------------------------------------------------
# Check whether we can build the Mirror VFD
# Check whether we can build the mirror VFD
# ----------------------------------------------------------------------
option (HDF5_ENABLE_MIRROR_VFD "Build the Mirror Virtual File Driver" OFF)
if (HDF5_ENABLE_MIRROR_VFD)
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23 changes: 0 additions & 23 deletions config/cmake/HDFTests.c
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Expand Up @@ -89,29 +89,6 @@ int main ()

#endif /* DEV_T_IS_SCALAR */

#ifdef TEST_DIRECT_VFD_WORKS

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

int main(void)
{
int fid;

if ((fid = open("tst_file", O_CREAT | O_TRUNC | O_DIRECT, 0755)) < 0)
return 1;
close(fid);
remove("tst_file");

return 0;
}
#endif

#ifdef HAVE_DIRECT
SIMPLE_TEST(posix_memalign());
#endif

#ifdef HAVE_DEFAULT_SOURCE
/* Check default source */
#include <features.h>
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2 changes: 1 addition & 1 deletion config/cmake/libhdf5.settings.cmake.in
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Original file line number Diff line number Diff line change
Expand Up @@ -79,7 +79,7 @@ Dimension scales w/ new references: @DIMENSION_SCALES_WITH_NEW_REF@
With deprecated public symbols: @HDF5_ENABLE_DEPRECATED_SYMBOLS@
I/O filters (external): @EXTERNAL_FILTERS@
Map (H5M) API: @H5_HAVE_MAP_API@
Direct VFD: @H5_HAVE_DIRECT@
Direct VFD: @HDF5_ENABLE_DIRECT_VFD@
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Even though you stop the configure if (HAVE_O_DIRECT AND HAVE_POSIX_MEMALIGN) fails, the more correct is the H5_HAVE_DIRECT setting, instead of the option setting.
Also it would be consistent with the other VFDs.

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If you want it to say ON/OFF instead of 1/0 (as everything else in this file does), you need to use HDF5_ENABLE_DIRECT_VFD.

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The other VFDs should be adjusted similarly.

libhdf5.settings is a mess in CMake and clearly handled as an afterthought.

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If you want it to say ON/OFF instead of 1/0 (as everything else in this file does), you need to use HDF5_ENABLE_DIRECT_VFD.

Oh, yes we want yes/no in the file. As long as the option matches the actual setting, then the option is preferred.

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The other VFDs should be adjusted similarly.

libhdf5.settings is a mess in CMake and clearly handled as an afterthought.

It was copied from the autotools version and tried to use similar variables.

Mirror VFD: @H5_HAVE_MIRROR_VFD@
Subfiling VFD: @H5_HAVE_SUBFILING_VFD@
(Read-Only) S3 VFD: @H5_HAVE_ROS3_VFD@
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