Trying to link a SFML-app on fedora 25 - c++

Question

Hi everyone,
I have some trouble trying to use the SFML library.I've tried different thing to make it work but always failing.
I downloaded the official package but nothing worked when I tried to compile a basic program.
I downloaded the version 2.4.1and put includes folder in /src/local/include/ and libs files in /src/local/lib/. It was better than with the official package : I successfully got my .o. But the linking phase told me to install the jpeg library. So I did it but it was already installed on my system (Fedora 25) and doesn't changed anything. I saw on some forums that fedora use an other library to create jpeg picture : libjpeg-turbo which is a fork of the libjpeg. I have tried many thing to force my linux to use the libjpeg 8 instead of the one installed but without success.
To make it work I tried the last solution : compile the SFML myself. So I downloaded sources, launch cmake and saw that it was missing lot something like 8 libraries to my laptop. After installed all those libraries I compile and install the SFML with the make target. Once it was done the compiling phase still working but the linking phase return me a obscure message for me (I translated it) :
/usr/bin/ld: test: hidden symbol « __cpu_model » in
/usr/lib/gcc/x86_64-redhat-linux/6.2.1/libgcc.a(cpuinfo.o) is
referenced by DSO
/usr/bin/ld : Failure during final link editing : Wrong value
collect2: error : ld has returned 1 execution status code
Do anyone know what's wrong ?

Answer 1

SFML has issues with gcc 5.3 and newer. Currently GCC is version 6.3.1 in Fedora 25 repositories. You should apply this patch:
diff --git a/src/SFML/Graphics/CMakeLists.txt b/src/SFML/Graphics/CMakeLists.txt
index 6f02fb6..bdc84e7 100644
--- a/src/SFML/Graphics/CMakeLists.txt
+++ b/src/SFML/Graphics/CMakeLists.txt
## -148,6 +148,13 ## add_definitions(-DSTBI_FAILURE_USERMSG)
# when gcc is used; otherwise saving PNGs may crash in stb_image_write
if(SFML_COMPILER_GCC)
set_source_files_properties(${SRCROOT}/ImageLoader.cpp PROPERTIES COMPILE_FLAGS -fno-strict-aliasing)
+
+endif()
+
+# see https://bugs.launchpad.net/ubuntu/+source/gcc-5/+bug/1568899
+if(SFML_COMPILER_GCC AND BUILD_SHARED_LIBS)
+ message(WARNING "Applying workaround for https://bugs.launchpad.net/ubuntu/+source/gcc-5/+bug/1568899")
+ list(APPEND GRAPHICS_EXT_LIBS "-lgcc_s -lgcc")
endif()
# define the sfml-graphics target
If you do not want to download the SFML git repository, just open src/SFML/Graphics/CMakeLists.txt, locate the if conditional statement with the ImageLoader.cpp comment (line 150) and append the lines added by the patch. The end result should look like this:
# ImageLoader.cpp must be compiled with the -fno-strict-aliasing
# when gcc is used; otherwise saving PNGs may crash in stb_image_write
if(SFML_COMPILER_GCC)
set_source_files_properties(${SRCROOT}/ImageLoader.cpp PROPERTIES COMPILE_FLAGS -fno-strict-aliasing)
endif()
# see https://bugs.launchpad.net/ubuntu/+source/gcc-5/+bug/1568899
if(SFML_COMPILER_GCC AND BUILD_SHARED_LIBS)
message(WARNING "Applying workaround for https://bugs.launchpad.net/ubuntu/+source/gcc-5/+bug/1568899")
list(APPEND GRAPHICS_EXT_LIBS "-lgcc_s -lgcc")
endif()