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Only add -Wno-stringop-truncation on supported compilers

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The -Wno-stringop-truncation flag is only supported by some GCC versions
and not by Clang (macOS, FreeBSD) at all.

Move the includes to the top the file to have them available when running
the check_c_compiler_flag.

Change-Id: I452bc4ee935d13f8e9095d0a31805a3bbaff0cec
Signed-off-by: Arne Schwabe <arne@rfc2549.org>
Acked-by: Frank Lichtenheld <frank@lichtenheld.com>
Message-Id: <20230629215611.3292788-3-arne@rfc2549.org>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg26791.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
This commit is contained in:
Arne Schwabe 2023-06-29 23:56:08 +02:00 committed by Gert Doering
parent 5dbec1c019
commit eb3cd5ea36
1 changed files with 14 additions and 8 deletions
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22
CMakeLists.txt
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@ -12,6 +12,14 @@ project(openvpn)
# and OpenSSL having version 1.1.1+ and generally does not offer the same
# configurability like autoconf
find_package(PkgConfig REQUIRED)
include(CheckSymbolExists)
include(CheckIncludeFiles)
include(CheckCCompilerFlag)
include(CheckTypeSize)
include(CheckStructHasMember)
include(CTest)
option(UNSUPPORTED_BUILDS "Allow unsupported builds" OFF)
if (NOT WIN32 AND NOT ${UNSUPPORTED_BUILDS})
@ -70,7 +78,12 @@ else ()
set(CMAKE_CXX_FLAGS_RELEASE "-O2")
set(CMAKE_C_FLAGS_DEBUG "-g -O1")
set(CMAKE_CXX_FLAGS_DEBUG "-g -O1")
add_compile_options(-Wall -Wuninitialized -Wno-stringop-truncation)
add_compile_options(-Wall -Wuninitialized)
check_c_compiler_flag(-Wno-stringop-truncation NoStringOpTruncation)
if (${NoStringOpTruncation})
add_compile_options(-Wno-stringop-truncation)
endif()
# We are not ready for this
#add_compile_options(-Wconversion -Wno-sign-conversion -Wsign-compare)
if (USE_WERROR)
@ -78,13 +91,6 @@ else ()
endif ()
endif ()
find_package(PkgConfig REQUIRED)
include(CheckSymbolExists)
include(CheckIncludeFiles)
include(CheckTypeSize)
include(CheckStructHasMember)
include(CTest)
find_program(PYTHON NAMES python3 python)
execute_process(
COMMAND ${PYTHON} ${CMAKE_CURRENT_SOURCE_DIR}/contrib/cmake/parse-version.m4.py ${CMAKE_CURRENT_SOURCE_DIR}/version.m4