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Added support to build Fun using musl libc instead glibc on a glibc based system (-DFUN_USE_MUSL). Alpine will ignore this feature... ;) (0.37.8)

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Johannes Findeisen 2025-12-12 00:56:52 +01:00
commit 5b90ff497c
1 changed files with 30 additions and 2 deletions
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32
CMakeLists.txt
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@ -1,5 +1,5 @@
cmake_minimum_required(VERSION 3.10)
project(fun VERSION 0.37.7 LANGUAGES C)
project(fun VERSION 0.37.8 LANGUAGES C)
set(CMAKE_C_STANDARD 99)
set(CMAKE_C_STANDARD_REQUIRED ON)
@ -25,6 +25,34 @@ else()
set(DEFAULT_LIB_DIR "${DEFAULT_LIB_DIR}" CACHE PATH "Default library directory for Fun stdlib (override with -DDEFAULT_LIB_DIR=...)" FORCE)
endif()
# Optional: build using musl libc instead of glibc on Linux (OFF by default)
# Note: Switching CMAKE_C_COMPILER must happen before the first project() call.
option(FUN_USE_MUSL "Use musl libc toolchain when available (Linux only)" OFF)
if(FUN_USE_MUSL AND UNIX AND NOT APPLE)
# Try to find a musl toolchain wrapper
find_program(_FUN_MUSL_CC NAMES musl-gcc musl-clang)
if(_FUN_MUSL_CC)
message(STATUS "FUN_USE_MUSL=ON: using musl toolchain: ${_FUN_MUSL_CC}")
# Force C compiler to musl wrapper before project() so the whole toolchain is configured accordingly
set(CMAKE_C_COMPILER "${_FUN_MUSL_CC}" CACHE FILEPATH "C compiler" FORCE)
set(FUN_LIBC "musl" CACHE STRING "Selected C library")
else()
message(WARNING "FUN_USE_MUSL=ON but no musl toolchain (musl-gcc or musl-clang) found. Falling back to default compiler (likely glibc).")
set(FUN_LIBC "glibc" CACHE STRING "Selected C library")
endif()
else()
# Default remains the system toolchain (typically glibc on Linux)
set(FUN_LIBC "glibc" CACHE STRING "Selected C library")
endif()
# Expose a preprocessor macro indicating selected C library
if(FUN_LIBC STREQUAL "musl")
add_definitions(-DFUN_LIBC_MUSL)
else()
add_definitions(-DFUN_LIBC_GLIBC)
endif()
# Optional: build statically linked executables
# When enabled, prefer static libraries for all dependencies and request
# fully static linking for executables where the platform/toolchain allows it.
@ -256,7 +284,7 @@ option(FUN_WITH_LIBSQL "Enable libsql (Turso) client support" OFF)
set(LIBSQL_INCLUDE_DIRS "")
set(LIBSQL_LINK_LIBS "")
if(FUN_WITH_LIBSQL)
message(STATUS "Building with libsql support")
message(STATUS "Building with libSQL support")
add_definitions(-DFUN_WITH_LIBSQL)
# Try pkg-config for libsql first; some systems expose libsql-client
find_package(PkgConfig QUIET)