nixpkgs/pkgs/build-support/cc-wrapper/gnat-wrapper.sh
John Ericson 2493454e13 cc-wrapper: Use set -u throughout
Now is an opportune time to do this, as the infixSalt conversion in
`add-flags.sh` ensures that all the relevant `NIX_*` vars will be
defined even if empty.
2017-08-07 03:05:51 -04:00

131 lines
3.6 KiB
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#! @shell@
set -eu -o pipefail
shopt -s nullglob
# N.B. Gnat is not used during bootstrapping, so we don't need to
# worry about the old bash empty array `set -u` workarounds.
path_backup="$PATH"
# phase separation makes this look useless
# shellcheck disable=SC2157
if [ -n "@coreutils_bin@" ]; then
PATH="@coreutils_bin@/bin"
fi
if [ -z "${NIX_@infixSalt@_GNAT_WRAPPER_FLAGS_SET:-}" ]; then
source @out@/nix-support/add-flags.sh
fi
if [ -n "$NIX_@infixSalt@_GNAT_WRAPPER_START_HOOK" ]; then
source "$NIX_@infixSalt@_GNAT_WRAPPER_START_HOOK"
fi
source @out@/nix-support/utils.sh
# Figure out if linker flags should be passed. GCC prints annoying
# warnings when they are not needed.
dontLink=0
nonFlagArgs=0
for i in "$@"; do
if [ "$i" = -c ]; then
dontLink=1
elif [ "$i" = -M ]; then
dontLink=1
elif [ "${i:0:1}" != - ]; then
nonFlagArgs=1
elif [ "$i" = -m32 ]; then
if [ -e @out@/nix-support/dynamic-linker-m32 ]; then
NIX_@infixSalt@_LDFLAGS+=" -dynamic-linker $(< @out@/nix-support/dynamic-linker-m32)"
fi
fi
done
# If we pass a flag like -Wl, then gcc will call the linker unless it
# can figure out that it has to do something else (e.g., because of a
# "-c" flag). So if no non-flag arguments are given, don't pass any
# linker flags. This catches cases like "gcc" (should just print
# "gcc: no input files") and "gcc -v" (should print the version).
if [ "$nonFlagArgs" = 0 ]; then
dontLink=1
fi
# Optionally filter out paths not refering to the store.
params=("$@")
if [[ "${NIX_ENFORCE_PURITY:-}" = 1 && -n "$NIX_STORE" ]]; then
rest=()
for p in "${params[@]}"; do
if [ "${p:0:3}" = -L/ ] && badPath "${p:2}"; then
skip "${p:2}"
elif [ "${p:0:3}" = -I/ ] && badPath "${p:2}"; then
skip "${p:2}"
elif [ "${p:0:4}" = -aI/ ] && badPath "${p:3}"; then
skip "${p:2}"
elif [ "${p:0:4}" = -aO/ ] && badPath "${p:3}"; then
skip "${p:2}"
else
rest+=("$p")
fi
done
params=("${rest[@]}")
fi
# Clear march/mtune=native -- they bring impurity.
if [ "$NIX_@infixSalt@_ENFORCE_NO_NATIVE" = 1 ]; then
rest=()
for p in "${params[@]}"; do
if [[ "$p" = -m*=native ]]; then
skip "$p"
else
rest+=("$p")
fi
done
params=("${rest[@]}")
fi
# Add the flags for the GNAT compiler proper.
extraAfter=($NIX_@infixSalt@_GNATFLAGS_COMPILE)
extraBefore=()
if [ "$(basename "$0")x" = "gnatmakex" ]; then
extraBefore=("--GNATBIND=@out@/bin/gnatbind" "--GNATLINK=@out@/bin/gnatlink ")
fi
#if [ "$dontLink" != 1 ]; then
# # Add the flags that should be passed to the linker (and prevent
# # `ld-wrapper' from adding NIX_@infixSalt@_LDFLAGS again).
# for i in $NIX_@infixSalt@_LDFLAGS_BEFORE; do
# extraBefore+=("-largs" "$i")
# done
# for i in $NIX_@infixSalt@_LDFLAGS; do
# if [ "${i:0:3}" = -L/ ]; then
# extraAfter+=("$i")
# else
# extraAfter+=("-largs" "$i")
# fi
# done
# export NIX_@infixSalt@_LDFLAGS_SET=1
#fi
# Optionally print debug info.
if [ -n "${NIX_DEBUG:-}" ]; then
echo "extra flags before to @prog@:" >&2
printf " %q\n" "${extraBefore[@]}" >&2
echo "original flags to @prog@:" >&2
printf " %q\n" "${params[@]}" >&2
echo "extra flags after to @prog@:" >&2
printf " %q\n" "${extraAfter[@]}" >&2
fi
if [ -n "$NIX_@infixSalt@_GNAT_WRAPPER_EXEC_HOOK" ]; then
source "$NIX_@infixSalt@_GNAT_WRAPPER_EXEC_HOOK"
fi
PATH="$path_backup"
exec @prog@ "${extraBefore[@]}" "${params[@]}" "${extraAfter[@]}"