Build shared lib with CMake

[inkydragon]

• build shared lib
• build both static and shared lib
• add CI

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4da8046..7a4ee75 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,7 +4,7 @@ project(openlibm
         VERSION 0.8.0
         LANGUAGES C ASM)
 
-add_library("${PROJECT_NAME}" STATIC)
+add_library("${PROJECT_NAME}" SHARED)

It compiles fine, but there are errors when linking.

cmake build log

[100%] Linking C shared library libopenlibm.so
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/e_remainder.S.o: in function `remainder':
(.text+0x0): multiple definition of `remainder'; CMakeFiles/openlibm.dir/src/e_remainder.c.o:e_remainder.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/e_remainderf.S.o: in function `remainderf':
(.text+0x0): multiple definition of `remainderf'; CMakeFiles/openlibm.dir/src/e_remainderf.c.o:e_remainderf.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/e_remainderl.S.o: in function `remainderl':
(.text+0x0): multiple definition of `remainderl'; CMakeFiles/openlibm.dir/src/e_remainderl.c.o:e_remainderl.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/e_sqrt.S.o: in function `sqrt':
(.text+0x0): multiple definition of `sqrt'; CMakeFiles/openlibm.dir/src/e_sqrt.c.o:e_sqrt.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/e_sqrtf.S.o: in function `sqrtf':
(.text+0x0): multiple definition of `sqrtf'; CMakeFiles/openlibm.dir/src/e_sqrtf.c.o:e_sqrtf.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/e_sqrtl.S.o: in function `sqrtl':
(.text+0x0): multiple definition of `sqrtl'; CMakeFiles/openlibm.dir/src/e_sqrtl.c.o:e_sqrtl.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/s_llrint.S.o: in function `llrint':
(.text+0x0): multiple definition of `llrint'; CMakeFiles/openlibm.dir/src/s_llrint.c.o:s_llrint.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/s_llrintf.S.o: in function `llrintf':
(.text+0x0): multiple definition of `llrintf'; CMakeFiles/openlibm.dir/src/s_llrintf.c.o:s_llrintf.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/s_llrintl.S.o: in function `llrintl':
(.text+0x0): multiple definition of `llrintl'; CMakeFiles/openlibm.dir/src/s_llrintl.c.o:s_llrintl.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/s_logbl.S.o: in function `logbl':
(.text+0x0): multiple definition of `logbl'; CMakeFiles/openlibm.dir/src/s_logbl.c.o:s_logbl.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/s_lrint.S.o: in function `lrint':
(.text+0x0): multiple definition of `lrint'; CMakeFiles/openlibm.dir/src/s_lrint.c.o:s_lrint.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/s_lrintf.S.o: in function `lrintf':
(.text+0x0): multiple definition of `lrintf'; CMakeFiles/openlibm.dir/src/s_lrintf.c.o:s_lrintf.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/s_lrintl.S.o: in function `lrintl':
(.text+0x0): multiple definition of `lrintl'; CMakeFiles/openlibm.dir/src/s_lrintl.c.o:s_lrintl.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/s_remquo.S.o: in function `remquo':
(.text+0x0): multiple definition of `remquo'; CMakeFiles/openlibm.dir/src/s_remquo.c.o:s_remquo.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/s_remquof.S.o: in function `remquof':
(.text+0x0): multiple definition of `remquof'; CMakeFiles/openlibm.dir/src/s_remquof.c.o:s_remquof.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/s_remquol.S.o: in function `remquol':
(.text+0x0): multiple definition of `remquol'; CMakeFiles/openlibm.dir/src/s_remquol.c.o:s_remquol.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/s_rintl.S.o: in function `rintl':
(.text+0x0): multiple definition of `rintl'; CMakeFiles/openlibm.dir/src/s_rintl.c.o:s_rintl.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/s_scalbn.S.o: in function `scalbn':
(.text+0x0): multiple definition of `scalbn'; CMakeFiles/openlibm.dir/src/s_scalbn.c.o:s_scalbn.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/s_scalbn.S.o: in function `scalbn':
(.text+0x0): multiple definition of `ldexp'; CMakeFiles/openlibm.dir/src/s_scalbn.c.o:s_scalbn.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/s_scalbnf.S.o: in function `scalbnf':
(.text+0x0): multiple definition of `scalbnf'; CMakeFiles/openlibm.dir/src/s_scalbnf.c.o:s_scalbnf.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/s_scalbnf.S.o: in function `scalbnf':
(.text+0x0): multiple definition of `ldexpf'; CMakeFiles/openlibm.dir/src/s_scalbnf.c.o:s_scalbnf.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/s_scalbnl.S.o: in function `scalbnl':
(.text+0x0): multiple definition of `scalbnl'; CMakeFiles/openlibm.dir/src/s_scalbnl.c.o:s_scalbnl.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/s_scalbnl.S.o: in function `scalbnl':
(.text+0x0): multiple definition of `ldexpl'; CMakeFiles/openlibm.dir/src/s_scalbnl.c.o:s_scalbnl.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/e_fmod.S.o: in function `fmod':
(.text+0x0): multiple definition of `fmod'; CMakeFiles/openlibm.dir/src/e_fmod.c.o:e_fmod.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/e_fmodf.S.o: in function `fmodf':
(.text+0x0): multiple definition of `fmodf'; CMakeFiles/openlibm.dir/src/e_fmodf.c.o:e_fmodf.c:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/openlibm.dir/amd64/e_fmodl.S.o: in function `fmodl':
(.text+0x0): multiple definition of `fmodl'; CMakeFiles/openlibm.dir/src/e_fmodl.c.o:e_fmodl.c:(.text+0x0): first defined here
collect2: error: ld returned 1 exit status
gmake[2]: *** [CMakeFiles/openlibm.dir/build.make:4522: libopenlibm.so] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:83: CMakeFiles/openlibm.dir/all] Error 2
gmake: *** [Makefile:91: all] Error 2

Maybe we don't need the generic C implementation in src/ when there is a native assembly implementation for the corresponding architecture.