diff options
Diffstat (limited to 'pkgs/build-support/gcc-wrapper2/gcc-wrapper.sh')
-rw-r--r-- | pkgs/build-support/gcc-wrapper2/gcc-wrapper.sh | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/pkgs/build-support/gcc-wrapper2/gcc-wrapper.sh b/pkgs/build-support/gcc-wrapper2/gcc-wrapper.sh new file mode 100644 index 000000000000..8a49fcb9b06e --- /dev/null +++ b/pkgs/build-support/gcc-wrapper2/gcc-wrapper.sh @@ -0,0 +1,148 @@ +#! @shell@ -e + +if test -n "$NIX_GCC_WRAPPER_START_HOOK"; then + source "$NIX_GCC_WRAPPER_START_HOOK" +fi + +if test -z "$NIX_GCC_WRAPPER_FLAGS_SET"; then + source @out@/nix-support/add-flags.sh +fi + +source @out@/nix-support/utils.sh + + +# Figure out if linker flags should be passed. GCC prints annoying +# warnings when they are not needed. +dontLink=0 +getVersion=0 +nonFlagArgs=0 + +for i in "$@"; do + if test "$i" = "-c"; then + dontLink=1 + elif test "$i" = "-S"; then + dontLink=1 + elif test "$i" = "-E"; then + dontLink=1 + elif test "$i" = "-E"; then + dontLink=1 + elif test "$i" = "-M"; then + dontLink=1 + elif test "$i" = "-MM"; then + dontLink=1 + elif test "${i:0:1}" != "-"; then + nonFlagArgs=1 + elif test "$i" = "-m32"; then + if test -e @out@/nix-support/dynamic-linker-m32; then + NIX_LDFLAGS="$NIX_LDFLAGS -dynamic-linker $(cat @out@/nix-support/dynamic-linker-m32)" + fi + fi +done + +# If we pass a flag like -Wl, then gcc will call the linker unless it +# can figure out that it has to do something else (e.g., because of a +# "-c" flag). So if no non-flag arguments are given, don't pass any +# linker flags. This catches cases like "gcc" (should just print +# "gcc: no input files") and "gcc -v" (should print the version). +if test "$nonFlagArgs" = "0"; then + dontLink=1 +fi + + +# Optionally filter out paths not refering to the store. +params=("$@") +if test "$NIX_ENFORCE_PURITY" = "1" -a -n "$NIX_STORE"; then + rest=() + n=0 + while test $n -lt ${#params[*]}; do + p=${params[n]} + p2=${params[$((n+1))]} + if test "${p:0:3}" = "-L/" && badPath "${p:2}"; then + skip $p + elif test "$p" = "-L" && badPath "$p2"; then + n=$((n + 1)); skip $p2 + elif test "${p:0:3}" = "-I/" && badPath "${p:2}"; then + skip $p + elif test "$p" = "-I" && badPath "$p2"; then + n=$((n + 1)); skip $p2 + elif test "$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=() + +if test "$dontLink" != "1"; then + + # Add the flags that should only be passed to the compiler when + # linking. + extraAfter=(${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 $NIX_LDFLAGS; do + if test "${i:0:3}" = "-L/"; then + extraAfter=(${extraAfter[@]} "$i") + else + extraAfter=(${extraAfter[@]} "-Wl,$i") + fi + done + export NIX_LDFLAGS_SET=1 + + if test "$NIX_STRIP_DEBUG" = "1"; then + # Add executable-stripping flags. + extraAfter=(${extraAfter[@]} $NIX_CFLAGS_STRIP) + fi +fi + +# As a very special hack, if the arguments are just `-v', then don't +# add anything. This is to prevent `gcc -v' (which normally prints +# out the version number and returns exit code 0) from printing out +# `No input files specified' and returning exit code 1. +if test "$*" = "-v"; then + extraAfter=() + extraBefore=() +fi + +# Optionally print debug info. +if test "$NIX_DEBUG" = "1"; then + echo "original flags to @gccProg@:" >&2 + for i in "${params[@]}"; do + echo " $i" >&2 + done + echo "extraBefore flags to @gccProg@:" >&2 + for i in ${extraBefore[@]}; do + echo " $i" >&2 + done + echo "extraAfter flags to @gccProg@:" >&2 + for i in ${extraAfter[@]}; do + echo " $i" >&2 + done +fi + +if test -n "$NIX_GCC_WRAPPER_EXEC_HOOK"; then + source "$NIX_GCC_WRAPPER_EXEC_HOOK" +fi + + +# Call the real `gcc'. Filter out warnings from stderr about unused +# `-B' flags, since they confuse some programs. Deep bash magic to +# apply grep to stderr (by swapping stdin/stderr twice). +if test -z "$NIX_GCC_NEEDS_GREP"; then + @gccProg@ ${extraBefore[@]} "${params[@]}" ${extraAfter[@]} +else + (@gccProg@ ${extraBefore[@]} "${params[@]}" ${extraAfter[@]} 3>&2 2>&1 1>&3- \ + | (grep -v 'file path prefix' || true); exit ${PIPESTATUS[0]}) 3>&2 2>&1 1>&3- + exit $? +fi |