7bea6aafae
- Add a conditional flag for the c++ std lib - Build binaries that get linked by our own dyld (someday) - Automatically add framework directories in the setup hook
152 lines
4.2 KiB
Bash
152 lines
4.2 KiB
Bash
#! @shell@ -e
|
|
|
|
if [ -n "$NIX_CC_WRAPPER_START_HOOK" ]; then
|
|
source "$NIX_CC_WRAPPER_START_HOOK"
|
|
fi
|
|
|
|
if [ -z "$NIX_CC_WRAPPER_FLAGS_SET" ]; then
|
|
source @out@/nix-support/add-flags.sh
|
|
fi
|
|
|
|
source @out@/nix-support/utils.sh
|
|
|
|
|
|
# Figure out if linker flags should be passed. GCC prints annoying
|
|
# warnings when they are not needed.
|
|
dontLink=0
|
|
getVersion=0
|
|
nonFlagArgs=0
|
|
|
|
for i in "$@"; do
|
|
if [ "$i" = -c ]; then
|
|
dontLink=1
|
|
elif [ "$i" = -S ]; then
|
|
dontLink=1
|
|
elif [ "$i" = -E ]; then
|
|
dontLink=1
|
|
elif [ "$i" = -E ]; then
|
|
dontLink=1
|
|
elif [ "$i" = -M ]; then
|
|
dontLink=1
|
|
elif [ "$i" = -MM ]; then
|
|
dontLink=1
|
|
elif [ "$i" = -x ]; then
|
|
# At least for the cases c-header or c++-header we should set dontLink.
|
|
# I expect no one use -x other than making precompiled headers.
|
|
dontLink=1
|
|
elif [ "${i:0:1}" != - ]; then
|
|
nonFlagArgs=1
|
|
elif [ "$i" = -m32 ]; then
|
|
if [ -e @out@/nix-support/dynamic-linker-m32 ]; then
|
|
NIX_LDFLAGS="$NIX_LDFLAGS -dynamic-linker $(cat @out@/nix-support/dynamic-linker-m32)"
|
|
fi
|
|
fi
|
|
done
|
|
|
|
# If we pass a flag like -Wl, then gcc will call the linker unless it
|
|
# can figure out that it has to do something else (e.g., because of a
|
|
# "-c" flag). So if no non-flag arguments are given, don't pass any
|
|
# linker flags. This catches cases like "gcc" (should just print
|
|
# "gcc: no input files") and "gcc -v" (should print the version).
|
|
if [ "$nonFlagArgs" = 0 ]; then
|
|
dontLink=1
|
|
fi
|
|
|
|
|
|
# Optionally filter out paths not refering to the store.
|
|
params=("$@")
|
|
if [ "$NIX_ENFORCE_PURITY" = 1 -a -n "$NIX_STORE" ]; then
|
|
rest=()
|
|
n=0
|
|
while [ $n -lt ${#params[*]} ]; do
|
|
p=${params[n]}
|
|
p2=${params[$((n+1))]}
|
|
if [ "${p:0:3}" = -L/ ] && badPath "${p:2}"; then
|
|
skip $p
|
|
elif [ "$p" = -L ] && badPath "$p2"; then
|
|
n=$((n + 1)); skip $p2
|
|
elif [ "${p:0:3}" = -I/ ] && badPath "${p:2}"; then
|
|
skip $p
|
|
elif [ "$p" = -I ] && badPath "$p2"; then
|
|
n=$((n + 1)); skip $p2
|
|
elif [ "$p" = -isystem ] && badPath "$p2"; then
|
|
n=$((n + 1)); skip $p2
|
|
else
|
|
rest=("${rest[@]}" "$p")
|
|
fi
|
|
n=$((n + 1))
|
|
done
|
|
params=("${rest[@]}")
|
|
fi
|
|
|
|
if [[ "@prog@" = *++ ]]; then
|
|
if echo "$@" | grep -qvw -- -nostdlib; then
|
|
NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE $NIX_CXXSTDLIB_COMPILE"
|
|
NIX_CFLAGS_LINK="$NIX_CFLAGS_LINK $NIX_CXXSTDLIB_LINK"
|
|
fi
|
|
fi
|
|
|
|
# Add the flags for the C compiler proper.
|
|
extraAfter=($NIX_CFLAGS_COMPILE)
|
|
extraBefore=()
|
|
|
|
# When enforcing purity, pretend gcc can't find the current date and
|
|
# time
|
|
if [ "$NIX_ENFORCE_PURITY" = 1 ]; then
|
|
extraAfter+=('-D__DATE__="Jan 01 1970"'
|
|
'-D__TIME__="00:00:01"'
|
|
-Wno-builtin-macro-redefined)
|
|
fi
|
|
|
|
|
|
if [ "$dontLink" != 1 ]; then
|
|
|
|
# Add the flags that should only be passed to the compiler when
|
|
# linking.
|
|
extraAfter+=($NIX_CFLAGS_LINK)
|
|
|
|
# Add the flags that should be passed to the linker (and prevent
|
|
# `ld-wrapper' from adding NIX_LDFLAGS again).
|
|
for i in $NIX_LDFLAGS_BEFORE; do
|
|
extraBefore=(${extraBefore[@]} "-Wl,$i")
|
|
done
|
|
for i in $NIX_LDFLAGS; do
|
|
if [ "${i:0:3}" = -L/ ]; then
|
|
extraAfter+=("$i")
|
|
else
|
|
extraAfter+=("-Wl,$i")
|
|
fi
|
|
done
|
|
export NIX_LDFLAGS_SET=1
|
|
fi
|
|
|
|
# As a very special hack, if the arguments are just `-v', then don't
|
|
# add anything. This is to prevent `gcc -v' (which normally prints
|
|
# out the version number and returns exit code 0) from printing out
|
|
# `No input files specified' and returning exit code 1.
|
|
if [ "$*" = -v ]; then
|
|
extraAfter=()
|
|
extraBefore=()
|
|
fi
|
|
|
|
# Optionally print debug info.
|
|
if [ -n "$NIX_DEBUG" ]; then
|
|
echo "original flags to @prog@:" >&2
|
|
for i in "${params[@]}"; do
|
|
echo " $i" >&2
|
|
done
|
|
echo "extraBefore flags to @prog@:" >&2
|
|
for i in ${extraBefore[@]}; do
|
|
echo " $i" >&2
|
|
done
|
|
echo "extraAfter flags to @prog@:" >&2
|
|
for i in ${extraAfter[@]}; do
|
|
echo " $i" >&2
|
|
done
|
|
fi
|
|
|
|
if [ -n "$NIX_CC_WRAPPER_EXEC_HOOK" ]; then
|
|
source "$NIX_CC_WRAPPER_EXEC_HOOK"
|
|
fi
|
|
|
|
exec @prog@ ${extraBefore[@]} "${params[@]}" "${extraAfter[@]}"
|