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transmission/cmake/LargeFileSupport.cmake

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Define one of LFS macros instead of using xxx64 functions directly. There're too many functions and types to consider, and benefits of not using LFS macros aren't that big (I was thinking of using fts(3) but that may not happen soon or at all).
2015-03-10 22:31:09 +00:00
# Based on AC_SYS_LARGEFILE
if(NOT DEFINED NO_LFS_MACROS_REQUIRED)
include(CheckCSourceCompiles)
# Check that off_t can represent 2**63 - 1 correctly.
# We can't simply define LARGE_OFF_T to be 9223372036854775807,
# since some C++ compilers masquerading as C compilers
# incorrectly reject 9223372036854775807.
fix: largefile support cmake tests (#4627)
2023-01-21 18:20:10 +00:00
#
# Begin with a linefeed to ensure the first line isn't part
# of the #defines below
set(LFS_TEST_PROGRAM "
#include <sys/types.h>
Define one of LFS macros instead of using xxx64 functions directly. There're too many functions and types to consider, and benefits of not using LFS macros aren't that big (I was thinking of using fts(3) but that may not happen soon or at all).
2015-03-10 22:31:09 +00:00
#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721 && LARGE_OFF_T % 2147483647 == 1) ? 1 : -1];
Modernize CMake code (ongoing refactoring) (#4507) * Reformat CMake code * Bump minimum CMake version to 3.12 * Add target sources separately via `target_source()` * Make `tr_win32_app_info()` add target sources on its own * Don't use `include_directories()` * Don't use `add_definitions()` * Limit use of `add_compile_options()` * Move VDKQueue target declaration to a subdirectory * Add `tr_disable_source_files_compile()` helper * Add `tr_target_glib_resources()` helper * Add `tr_gettext_msgfmt()` helper * Enable AUTOUIC for Qt client * Enable AUTORCC for Qt client * Remove AUTO{MOC,RCC,UIC} source group overrides * Add `tr_target_idl_files()` helper * Move source group setup to `tr_qt_add_translation()` * Add `tr_target_xib_files()` helper * Prefer `target_sources()` to intermediate variables * Use explicit visibility versions of `target_*()` commands * Prefer genexes to conditions in `target_*()` commands * Add `tr_allow_compile_if()` helper * Leave only top-level `project()`, remove the rest * Minor fixups * Fixup Mac QL plugin install * Fixup IDE target folders and source groups
2023-01-01 19:49:48 +00:00
int main() { return 0; }")
Define one of LFS macros instead of using xxx64 functions directly. There're too many functions and types to consider, and benefits of not using LFS macros aren't that big (I was thinking of using fts(3) but that may not happen soon or at all).
2015-03-10 22:31:09 +00:00
check_c_source_compiles("${LFS_TEST_PROGRAM}" NO_LFS_MACROS_REQUIRED)
if(NOT NO_LFS_MACROS_REQUIRED)
if(NOT DEFINED FILE_OFFSET_BITS_LFS_MACRO_REQUIRED)
check_c_source_compiles("#define _FILE_OFFSET_BITS 64 ${LFS_TEST_PROGRAM}" FILE_OFFSET_BITS_LFS_MACRO_REQUIRED)
Make sure LargeFileSupport flags are set correctly after repeated calls to cmake/ccmake/cmake-gui (#2039) Co-authored-by: Mike Gelfand <mikedld@users.noreply.github.com> Co-authored-by: Charles Kerr <charles@charleskerr.com>
2021-10-26 19:14:35 +00:00
if(NOT FILE_OFFSET_BITS_LFS_MACRO_REQUIRED AND NOT DEFINED LARGE_FILES_LFS_MACRO_REQUIRED)
Define one of LFS macros instead of using xxx64 functions directly. There're too many functions and types to consider, and benefits of not using LFS macros aren't that big (I was thinking of using fts(3) but that may not happen soon or at all).
2015-03-10 22:31:09 +00:00
check_c_source_compiles("#define _LARGE_FILES 1 ${LFS_TEST_PROGRAM}" LARGE_FILES_LFS_MACRO_REQUIRED)
endif()
endif()
endif()
unset(LFS_TEST_PROGRAM)
endif()
Make sure LargeFileSupport flags are set correctly after repeated calls to cmake/ccmake/cmake-gui (#2039) Co-authored-by: Mike Gelfand <mikedld@users.noreply.github.com> Co-authored-by: Charles Kerr <charles@charleskerr.com>
2021-10-26 19:14:35 +00:00
if(FILE_OFFSET_BITS_LFS_MACRO_REQUIRED)
add_definitions(-D_FILE_OFFSET_BITS=64)
endif()
if(LARGE_FILES_LFS_MACRO_REQUIRED)
add_definitions(-D_LARGE_FILES=1)
endif()
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