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