fix: include easy to use cmake settings for toolchain setup

Author: jaromil

.github/workflows/main.yml

@@ -80,6 +80,7 @@ jobs:
           make -C libs ARCH=${{ matrix.target }}
           rm -rf /opt/musl-dyne/share/man
           cat README.md | awk '{gsub(/\[[^][]+\]\([^()]+\)/, gensub(/\[([^][]+)\]\([^()]+\)/, "\\1", "g")); print}' | fmt -w 72 > /opt/musl-dyne/README.txt
+          cp settings.cmake /opt/musl-dyne/
           echo "Compressing:  musl-dyne-${{ matrix.output }}.tar.xz"
           cd /opt && tar -cJf musl-dyne-${{ matrix.output }}.tar.xz musl-dyne
       - name: Upload release artifacts musl-dyne-${{ matrix.output }}

settings.cmake

@@ -0,0 +1,19 @@
+# CMake settings for the dyne/musl toolchain
+
+set(ARCH "x86_64-linux-musl" CACHE STRING "Target architecture to (cross)compile")
+set(PREFIX "/opt/musl-dyne")
+set(CMAKE_CXX_FLAGS "-static -g0 -Os -fstack-protector-all -D_FORTIFY_SOURCE=2 -fno-strict-overflow")
+# -I ${PREFIX}/${ARCH}/include
+include_directories(SYSTEM "${PREFIX}/${ARCH}/include")
+# set(CMAKE_PREFIX_PATH "${PREFIX}/${ARCH}")
+set(CMAKE_SYSROOT "${PREFIX}/${ARCH}")
+
+# Remove flags added by build type
+set(CMAKE_BUILD_TYPE "Release")
+set(CMAKE_CXX_FLAGS_RELEASE "")
+set(CMAKE_C_COMPILER "${PREFIX}/bin/${ARCH}-gcc")
+set(CMAKE_CXX_COMPILER "${PREFIX}/bin/${ARCH}-g++")
+option(CCACHE "Use ccache to speed up compilation")
+if(CCACHE)
+  set(CMAKE_CXX_COMPILER_LAUNCHER "ccache")
+endif()