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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=(
NIX+CFLAGS_COMPILE
NIX+CFLAGS_LINK
NIX+CXXSTDLIB_COMPILE
NIX+CXXSTDLIB_LINK
NIX+GNATFLAGS_COMPILE
NIX+IGNORE_LD_THROUGH_GCC
NIX+LDFLAGS
NIX+LDFLAGS_BEFORE
NIX+LDFLAGS_AFTER
NIX+LDFLAGS_HARDEN
NIX+SET_BUILD_ID
NIX+DONT_SET_RPATH
NIX+ENFORCE_NO_NATIVE
)
# Accumulate infixes for taking in the right input parameters. See setup-hook
# for details.
declare -a role_infixes=()
if [ "${NIX_CC_WRAPPER_@infixSalt@_TARGET_BUILD:-}" ]; then
role_infixes+=(_BUILD_)
fi
if [ "${NIX_CC_WRAPPER_@infixSalt@_TARGET_HOST:-}" ]; then
role_infixes+=(_)
fi
if [ "${NIX_CC_WRAPPER_@infixSalt@_TARGET_TARGET:-}" ]; then
role_infixes+=(_TARGET_)
fi
# We need to mangle names for hygiene, but also take parameters/overrides
# from the environment.
for var in "${var_templates[@]}"; do
outputVar="${var/+/_@infixSalt@_}"
export ${outputVar}+=''
# For each role we serve, we accumulate the input parameters into our own
# cc-wrapper-derivation-specific environment variables.
for infix in "${role_infixes[@]}"; do
inputVar="${var/+/${infix}}"
if [ -v "$inputVar" ]; then
export ${outputVar}+="${!outputVar:+ }${!inputVar}"
fi
done
done
# `-B@out@/bin' forces cc to use ld-wrapper.sh when calling ld.
NIX_@infixSalt@_CFLAGS_COMPILE="-B@out@/bin/ $NIX_@infixSalt@_CFLAGS_COMPILE"
# Export and assign separately in order that a failing $(..) will fail
# the script.
if [ -e @out@/nix-support/libc-cflags ]; then
NIX_@infixSalt@_CFLAGS_COMPILE="$(< @out@/nix-support/libc-cflags) $NIX_@infixSalt@_CFLAGS_COMPILE"
fi
if [ -e @out@/nix-support/cc-cflags ]; then
NIX_@infixSalt@_CFLAGS_COMPILE="$(< @out@/nix-support/cc-cflags) $NIX_@infixSalt@_CFLAGS_COMPILE"
fi
if [ -e @out@/nix-support/gnat-cflags ]; then
NIX_@infixSalt@_GNATFLAGS_COMPILE="$(< @out@/nix-support/gnat-cflags) $NIX_@infixSalt@_GNATFLAGS_COMPILE"
fi
if [ -e @out@/nix-support/libc-ldflags ]; then
NIX_@infixSalt@_LDFLAGS+=" $(< @out@/nix-support/libc-ldflags)"
fi
if [ -e @out@/nix-support/cc-ldflags ]; then
NIX_@infixSalt@_LDFLAGS+=" $(< @out@/nix-support/cc-ldflags)"
fi
if [ -e @out@/nix-support/libc-ldflags-before ]; then
NIX_@infixSalt@_LDFLAGS_BEFORE="$(< @out@/nix-support/libc-ldflags-before) $NIX_@infixSalt@_LDFLAGS_BEFORE"
fi
# That way forked processes will not extend these environment variables again.
export NIX_CC_WRAPPER_@infixSalt@_FLAGS_SET=1
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