nixpkgs/pkgs/build-support/cc-wrapper/add-flags.sh
John Ericson 1ac5398589 *-wrapper; Switch from infixSalt to suffixSalt
I hate the thing too even though I made it, and rather just get rid of
it. But we can't do that yet. In the meantime, this brings us more
inline with autoconf and will make it slightly easier for me to write a
pkg-config wrapper, which we need.
2020-05-12 00:44:44 -04:00

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# 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 $(..) will fail
# the script.
if [ -e @out@/nix-support/libc-cflags ]; then
NIX_CFLAGS_COMPILE_@suffixSalt@="$(< @out@/nix-support/libc-cflags) $NIX_CFLAGS_COMPILE_@suffixSalt@"
fi
if [ -e @out@/nix-support/cc-cflags ]; then
NIX_CFLAGS_COMPILE_@suffixSalt@="$(< @out@/nix-support/cc-cflags) $NIX_CFLAGS_COMPILE_@suffixSalt@"
fi
if [ -e @out@/nix-support/gnat-cflags ]; then
NIX_GNATFLAGS_COMPILE_@suffixSalt@="$(< @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
# That way forked processes will not extend these environment variables again.
export NIX_CC_WRAPPER_FLAGS_SET_@suffixSalt@=1