pixi: Improve LDFLAGS definition

Author: jorisv

scripts/activation.sh

@@ -10,9 +10,17 @@ unset DEBUG_CPPFLAGS
 unset DEBUG_CXXFLAGS
 unset LDFLAGS
 
-# On OSX it's really important to setup these linker path or the linker
-# will use the system libc++ that can be incompatible with our dependencies
-export LDFLAGS="-Wl,-rpath,$CONDA_PREFIX/lib -L$CONDA_PREFIX/lib"
+if [[ $host_alias == *"apple"* ]];
+then
+  # On OSX setting the rpath and -L it's important to use the conda libc++ instead of the system one.
+  # If conda-forge use install_name_tool to package some libs, -headerpad_max_install_names is then mandatory
+  export LDFLAGS="-Wl,-headerpad_max_install_names -Wl,-rpath,$CONDA_PREFIX/lib -L$CONDA_PREFIX/lib"
+elif [[ $host_alias == *"linux"* ]];
+then
+  # On GNU/Linux, I don't know if these flags are mandatory with g++ but
+  # it allow to use clang++ as compiler
+  export LDFLAGS="-Wl,-rpath,$CONDA_PREFIX/lib -Wl,-rpath-link,$CONDA_PREFIX/lib -L$CONDA_PREFIX/lib"
+fi
 
 # Setup ccache
 export CMAKE_CXX_COMPILER_LAUNCHER=ccache