nixpkgs/pkgs/build-support/gcc-wrapper-old/gcc-wrapper-old.sh
John Wiegley 28b6fb61e6 Change occurrences of gcc to the more general cc
This is done for the sake of Yosemite, which does not have gcc, and yet
this change is also compatible with Linux.
2014-12-26 11:06:21 -06:00

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#! @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=("${rest[@]}")
fi
# Add the flags for the C compiler proper.
extraAfter=($NIX_CFLAGS_COMPILE)
extraBefore=()
# When enforcing purity, pretend gcc can't find the current date and
# time
if [ "$NIX_ENFORCE_PURITY" = 1 ]; then
extraAfter+=('-D__DATE__="Jan 01 1970"'
'-D__TIME__="00:00:01"'
)
fi
if [ "$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[@]}"