nixpkgs/pkgs/build-support/wrapper-common/utils.bash
Andrew Childs 2a9b3b4943 cc-wrapper, bintools-wrapper: support MACOSX_DEPLOYMENT_TARGET with roles
In a typical build environment the toolchain will use the value of the
MACOSX_DEPLOYMENT_TARGET environment variable to determine the version
of macOS to support. When cross compiling there are two distinct
toolchains, but they will look at this single environment variable. To
avoid contamination, we always set the equivalent command line flag
which effectively disables the toolchain's internal handling.

Prior to this change, the MACOSX_DEPLOYMENT_TARGET variable was
ignored, and the toolchains always used the Nix platform
definition (`darwinMinVersion`) unless overridden with command line
arguments.

This change restores support for MACOSX_DEPLOYMENT_TARGET, and adds
nix-specific MACOSX_DEPLOYMENT_TARGET_FOR_BUILD and
MACOSX_DEPLOYMENT_TARGET_FOR_TARGET for cross compilation.
2021-04-11 09:47:10 +09:00

126 lines
3.9 KiB
Bash

# Accumulate suffixes for taking in the right input parameters with the `mangle*`
# functions below. See setup-hook for details.
accumulateRoles() {
declare -ga role_suffixes=()
if [ "${NIX_@wrapperName@_TARGET_BUILD_@suffixSalt@:-}" ]; then
role_suffixes+=('_FOR_BUILD')
fi
if [ "${NIX_@wrapperName@_TARGET_HOST_@suffixSalt@:-}" ]; then
role_suffixes+=('')
fi
if [ "${NIX_@wrapperName@_TARGET_TARGET_@suffixSalt@:-}" ]; then
role_suffixes+=('_FOR_TARGET')
fi
}
mangleVarList() {
local var="$1"
shift
local -a role_suffixes=("$@")
local outputVar="${var}_@suffixSalt@"
declare -gx ${outputVar}+=''
# For each role we serve, we accumulate the input parameters into our own
# cc-wrapper-derivation-specific environment variables.
for suffix in "${role_suffixes[@]}"; do
local inputVar="${var}${suffix}"
if [ -v "$inputVar" ]; then
export ${outputVar}+="${!outputVar:+ }${!inputVar}"
fi
done
}
mangleVarBool() {
local var="$1"
shift
local -a role_suffixes=("$@")
local outputVar="${var}_@suffixSalt@"
declare -gxi ${outputVar}+=0
for suffix in "${role_suffixes[@]}"; do
local inputVar="${var}${suffix}"
if [ -v "$inputVar" ]; then
# "1" in the end makes `let` return success error code when
# expression itself evaluates to zero.
# We don't use `|| true` because that would silence actual
# syntax errors from bad variable values.
let "${outputVar} |= ${!inputVar:-0}" "1"
fi
done
}
# Combine a singular value from all roles. If multiple roles are being served,
# and the value differs in these roles then the request is impossible to
# satisfy and we abort immediately.
mangleVarSingle() {
local var="$1"
shift
local -a role_suffixes=("$@")
local outputVar="${var}_@suffixSalt@"
for suffix in "${role_suffixes[@]}"; do
local inputVar="${var}${suffix}"
if [ -v "$inputVar" ]; then
if [ -v "$outputVar" ]; then
if [ "${!outputVar}" != "${!inputVar}" ]; then
{
echo "Multiple conflicting values defined for $outputVar"
echo "Existing value is ${!outputVar}"
echo "Attempting to set to ${!inputVar} via $inputVar"
} >&2
exit 1
fi
else
declare -gx ${outputVar}="${!inputVar}"
fi
fi
done
}
skip () {
if (( "${NIX_DEBUG:-0}" >= 1 )); then
echo "skipping impure path $1" >&2
fi
}
# Checks whether a path is impure. E.g., `/lib/foo.so' is impure, but
# `/nix/store/.../lib/foo.so' isn't.
badPath() {
local p=$1
# Relative paths are okay (since they're presumably relative to
# the temporary build directory).
if [ "${p:0:1}" != / ]; then return 1; fi
# Otherwise, the path should refer to the store or some temporary
# directory (including the build directory).
test \
"$p" != "/dev/null" -a \
"${p#${NIX_STORE}}" = "$p" -a \
"${p#${NIX_BUILD_TOP}}" = "$p" -a \
"${p#/tmp}" = "$p" -a \
"${p#${TMP:-/tmp}}" = "$p" -a \
"${p#${TMPDIR:-/tmp}}" = "$p" -a \
"${p#${TEMP:-/tmp}}" = "$p" -a \
"${p#${TEMPDIR:-/tmp}}" = "$p"
}
expandResponseParams() {
declare -ga params=("$@")
local arg
for arg in "$@"; do
if [[ "$arg" == @* ]]; then
# phase separation makes this look useless
# shellcheck disable=SC2157
if [ -x "@expandResponseParams@" ]; then
# params is used by caller
#shellcheck disable=SC2034
readarray -d '' params < <("@expandResponseParams@" "$@")
return 0
fi
fi
done
}