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build: turn down the _FORTIFY_SOURCE level on gcc >= 4.0

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John Szakmeister 2014-11-04 17:06:18 -05:00
parent 04633e3e6b
commit 64ea00299d
1 changed files with 10 additions and 0 deletions
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10
CMakeLists.txt
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@ -42,6 +42,16 @@ if(APPLE)
endif()
endif()
# gcc 4.0 and better turn on _FORTIFY_SOURCE=2 automatically. This currently
# does not work with Neovim due to some uses of dynamically-sized structures.
# See https://github.com/neovim/neovim/issues/223 for details.
if(CMAKE_COMPILER_IS_GNUCC AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS "4")
# -U in add_definitions doesn't end up in the correct spot, so we add it to
# the flags variable instead.
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1")
endif()
add_definitions(-Wall -Wextra -pedantic -Wno-unused-parameter
-Wstrict-prototypes -std=gnu99)