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i2pd/build
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Fabrice Fontaine 6b33250c59 build/CMakeLists.txt: enable C language 
Detection of libatomic is broken since version 2.47.0 and
b7f0d87daf
because C language is not enabled anymore:

-- Looking for __atomic_fetch_add_4 in atomic
-- Looking for __atomic_fetch_add_4 in atomic - not found
CMake Error at cmake_modules/CheckAtomic.cmake:59 (message):
  Host compiler appears to require libatomic, but cannot find it.
Call Stack (most recent call first):
  CMakeLists.txt:54 (include)

Indeed if C language is not enabled, the test will be run with the C++
compiler resulting in the following error:

Building CXX object CMakeFiles/cmTC_03d01.dir/CheckFunctionExists.cxx.o
        /home/fabrice/buildroot/output/host/bin/x86_64-linux-g++ --sysroot=/home/fabrice/buildroot/output/host/x86_64-buildroot-linux-gnu/sysroot   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -O1 -g0 -D_FORTIFY_SOURCE=2 -DCHECK_FUNCTION_EXISTS=__atomic_fetch_add_4  -DNDEBUG -o CMakeFiles/cmTC_03d01.dir/CheckFunctionExists.cxx.o -c /home/fabrice/buildroot/output/build/i2pd-2.49.0/build/CMakeFiles/CMakeScratch/TryCompile-NApnv9/CheckFunctionExists.cxx
        <command-line>: error: new declaration ‘char __atomic_fetch_add_4()’ ambiguates built-in declaration ‘unsigned int __atomic_fetch_add_4(volatile void*, unsigned int, int)’ [-fpermissive]

whereas with a C compiler, we'll get:

Building C object CMakeFiles/cmTC_7e47b.dir/CheckFunctionExists.c.o
        /home/fabrice/buildroot/output/host/bin/x86_64-linux-gcc --sysroot=/home/fabrice/buildroot/output/host/x86_64-buildroot-linux-gnu/sysroot   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -O1 -g0 -D_FORTIFY_SOURCE=2 -DCHECK_FUNCTION_EXISTS=__atomic_fetch_add_4  -DNDEBUG -o CMakeFiles/cmTC_7e47b.dir/CheckFunctionExists.c.o -c /home/fabrice/buildroot/output/build/i2pd-2.49.0/build/CMakeFiles/CMakeScratch/TryCompile-e0zFMG/CheckFunctionExists.c
        <command-line>: warning: conflicting types for built-in function ‘__atomic_fetch_add_4’; expected ‘unsigned int(volatile void *, unsigned int,  int)’ [-Wbuiltin-declaration-mismatch]

Fix #1908

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
 		6 months ago
..
cmake_modules Fix architecture detection in cmake build (#1890) 1 year ago
.gitignore [cmake] msvc build revision 1 year ago
CMakeLists.txt build/CMakeLists.txt: enable C language 6 months ago
build_mingw.cmd fix mingw build script 2 years ago
win_installer.iss [win] add binary signing support 2 years ago