GCC/Clang: Treat void pointer arithmetic as error

As an extension, GNU C treats sizeof(void) as 1. MSVC doesn't.
Make it an error on GCC/Clang to avoid accidental MSVC breakage.
This commit is contained in:
Ahmad Fatoum 2018-01-18 13:22:41 +01:00
parent a2edc9d641
commit 30ef3f3122
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GPG key ID: C3EAC3DE9321D59B
2 changed files with 16 additions and 10 deletions

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@ -11,6 +11,11 @@ if(CMAKE_VERSION VERSION_LESS "3.1")
else()
set (CMAKE_C_STANDARD 99)
endif()
include(CheckCCompilerFlag)
CHECK_C_COMPILER_FLAG("-Werror=pointer-arith" COMPILER_HAS_POINTER_ARITH_TOGGLE)
if(COMPILER_HAS_POINTER_ARITH_TOGGLE)
set(CMAKE_C_FLAGS "-Werror=pointer-arith ${CMAKE_C_FLAGS}")
endif()
add_subdirectory(src release)