nextcloud-desktop/cmake/Modules/DefineCompilerFlags.cmake

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# define system dependent compiler flags
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include(CheckCCompilerFlag)
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include(MacroCheckCCompilerFlagSSP)
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if (UNIX AND NOT WIN32)
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#
# Define GNUCC compiler flags
#
if (${CMAKE_C_COMPILER_ID} MATCHES "(GNU|Clang)")
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# add -Wconversion ?
# cannot be pedantic with sqlite3 directly linked
if (NOT CSYNC_STATIC_COMPILE_DIR)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99 -pedantic -pedantic-errors")
endif()
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wshadow -Wmissing-prototypes -Wdeclaration-after-statement")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wunused -Wfloat-equal -Wpointer-arith -Wwrite-strings -Wformat-security")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wmissing-format-attribute")
# with -fPIC
check_c_compiler_flag("-fPIC" WITH_FPIC)
if (WITH_FPIC)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
endif (WITH_FPIC)
check_c_compiler_flag_ssp("-fstack-protector" WITH_STACK_PROTECTOR)
if (WITH_STACK_PROTECTOR)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fstack-protector")
endif (WITH_STACK_PROTECTOR)
check_c_compiler_flag("-D_FORTIFY_SOURCE=2" WITH_FORTIFY_SOURCE)
if (WITH_FORTIFY_SOURCE)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_FORTIFY_SOURCE=2")
endif (WITH_FORTIFY_SOURCE)
endif (${CMAKE_C_COMPILER_ID} MATCHES "(GNU|Clang)")
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#
# Check for large filesystem support
#
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if (CMAKE_SIZEOF_VOID_P MATCHES "8")
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# with large file support
execute_process(
COMMAND
getconf LFS64_CFLAGS
OUTPUT_VARIABLE
_lfs_CFLAGS
ERROR_QUIET
OUTPUT_STRIP_TRAILING_WHITESPACE
)
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else (CMAKE_SIZEOF_VOID_P MATCHES "8")
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# with large file support
execute_process(
COMMAND
getconf LFS_CFLAGS
OUTPUT_VARIABLE
_lfs_CFLAGS
ERROR_QUIET
OUTPUT_STRIP_TRAILING_WHITESPACE
)
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endif (CMAKE_SIZEOF_VOID_P MATCHES "8")
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if (_lfs_CFLAGS)
string(REGEX REPLACE "[\r\n]" " " "${_lfs_CFLAGS}" "${${_lfs_CFLAGS}}")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${_lfs_CFLAGS}")
endif (_lfs_CFLAGS)
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endif (UNIX AND NOT WIN32)