diff options
Diffstat (limited to 'nixpkgs/pkgs/build-support/cc-wrapper/add-flags.sh')
-rw-r--r-- | nixpkgs/pkgs/build-support/cc-wrapper/add-flags.sh | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/build-support/cc-wrapper/add-flags.sh b/nixpkgs/pkgs/build-support/cc-wrapper/add-flags.sh new file mode 100644 index 000000000000..c59118d6c09e --- /dev/null +++ b/nixpkgs/pkgs/build-support/cc-wrapper/add-flags.sh @@ -0,0 +1,87 @@ +# N.B. It may be a surprise that the derivation-specific variables are exported, +# since this is just sourced by the wrapped binaries---the end consumers. This +# is because one wrapper binary may invoke another (e.g. cc invoking ld). In +# that case, it is cheaper/better to not repeat this step and let the forked +# wrapped binary just inherit the work of the forker's wrapper script. + +var_templates_list=( + NIX_CFLAGS_COMPILE + NIX_CFLAGS_COMPILE_BEFORE + NIX_CFLAGS_LINK + NIX_CXXSTDLIB_COMPILE + NIX_CXXSTDLIB_LINK + NIX_GNATFLAGS_COMPILE +) +var_templates_bool=( + NIX_ENFORCE_NO_NATIVE +) + +accumulateRoles + +# We need to mangle names for hygiene, but also take parameters/overrides +# from the environment. +for var in "${var_templates_list[@]}"; do + mangleVarList "$var" ${role_suffixes[@]+"${role_suffixes[@]}"} +done +for var in "${var_templates_bool[@]}"; do + mangleVarBool "$var" ${role_suffixes[@]+"${role_suffixes[@]}"} +done + +# `-B@out@/bin' forces cc to use ld-wrapper.sh when calling ld. +NIX_CFLAGS_COMPILE_@suffixSalt@="-B@out@/bin/ $NIX_CFLAGS_COMPILE_@suffixSalt@" + +# Export and assign separately in order that a failing $(..) will fail +# the script. + +# Currently bootstrap-tools does not split glibc, and gcc files into +# separate directories. As a workaround we want resulting cflags to be +# ordered as: crt1-cflags libc-cflags cc-cflags. Otherwise we mix crt/libc.so +# from different libc as seen in +# https://github.com/NixOS/nixpkgs/issues/158042 +# +# Note that below has reverse ordering as we prepend flags one-by-one. +# Once bootstrap-tools is split into different directories we can stop +# relying on flag ordering below. + +if [ -e @out@/nix-support/cc-cflags ]; then + NIX_CFLAGS_COMPILE_@suffixSalt@="$(< @out@/nix-support/cc-cflags) $NIX_CFLAGS_COMPILE_@suffixSalt@" +fi + +if [[ "$cInclude" = 1 ]] && [ -e @out@/nix-support/libc-cflags ]; then + NIX_CFLAGS_COMPILE_@suffixSalt@="$(< @out@/nix-support/libc-cflags) $NIX_CFLAGS_COMPILE_@suffixSalt@" +fi + +if [ -e @out@/nix-support/libc-crt1-cflags ]; then + NIX_CFLAGS_COMPILE_@suffixSalt@="$(< @out@/nix-support/libc-crt1-cflags) $NIX_CFLAGS_COMPILE_@suffixSalt@" +fi + +if [ -e @out@/nix-support/libcxx-cxxflags ]; then + NIX_CXXSTDLIB_COMPILE_@suffixSalt@+=" $(< @out@/nix-support/libcxx-cxxflags)" +fi + +if [ -e @out@/nix-support/libcxx-ldflags ]; then + NIX_CXXSTDLIB_LINK_@suffixSalt@+=" $(< @out@/nix-support/libcxx-ldflags)" +fi + +if [ -e @out@/nix-support/gnat-cflags ]; then + NIX_GNATFLAGS_COMPILE_@suffixSalt@="$(< @out@/nix-support/gnat-cflags) $NIX_GNATFLAGS_COMPILE_@suffixSalt@" +fi + +if [ -e @out@/nix-support/cc-ldflags ]; then + NIX_LDFLAGS_@suffixSalt@+=" $(< @out@/nix-support/cc-ldflags)" +fi + +if [ -e @out@/nix-support/cc-cflags-before ]; then + NIX_CFLAGS_COMPILE_BEFORE_@suffixSalt@="$(< @out@/nix-support/cc-cflags-before) $NIX_CFLAGS_COMPILE_BEFORE_@suffixSalt@" +fi + +# Only add darwin min version flag if a default darwin min version is set, +# which is a signal that we're targetting darwin. +if [ "@darwinMinVersion@" ]; then + mangleVarSingle @darwinMinVersionVariable@ ${role_suffixes[@]+"${role_suffixes[@]}"} + + NIX_CFLAGS_COMPILE_BEFORE_@suffixSalt@="-m@darwinPlatformForCC@-version-min=${@darwinMinVersionVariable@_@suffixSalt@:-@darwinMinVersion@} $NIX_CFLAGS_COMPILE_BEFORE_@suffixSalt@" +fi + +# That way forked processes will not extend these environment variables again. +export NIX_CC_WRAPPER_FLAGS_SET_@suffixSalt@=1 |