bintools-wrapper: skip dynamic linker for static binaries
This commit is contained in:
Jörg Thalheim
parent
7659201d58
commit
61bbbcd1af
@ -3,6 +3,7 @@ var_templates_list=(
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NIX_IGNORE_LD_THROUGH_GCC
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NIX_LDFLAGS
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NIX_LDFLAGS_BEFORE
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NIX_DYNAMIC_LINKER
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NIX_LDFLAGS_AFTER
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NIX_LDFLAGS_HARDEN
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NIX_HARDENING_ENABLE
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@ -25,6 +26,10 @@ if [ -e @out@/nix-support/libc-ldflags ]; then
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NIX_LDFLAGS_@suffixSalt@+=" $(< @out@/nix-support/libc-ldflags)"
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fi
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if [ -z "$NIX_DYNAMIC_LINKER_@suffixSalt@" ] && [ -e @out@/nix-support/ld-set-dynamic-linker ]; then
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NIX_DYNAMIC_LINKER_@suffixSalt@="$(< @out@/nix-support/dynamic-linker)"
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fi
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if [ -e @out@/nix-support/libc-ldflags-before ]; then
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NIX_LDFLAGS_BEFORE_@suffixSalt@="$(< @out@/nix-support/libc-ldflags-before) $NIX_LDFLAGS_BEFORE_@suffixSalt@"
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fi
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@ -237,19 +237,14 @@ stdenv.mkDerivation {
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if [ -n "''${dynamicLinker-}" ]; then
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echo $dynamicLinker > $out/nix-support/dynamic-linker
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'' + (if targetPlatform.isDarwin then ''
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printf "export LD_DYLD_PATH=%q\n" "$dynamicLinker" >> $out/nix-support/setup-hook
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'' else ''
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if [ -e ${libc_lib}/lib/32/ld-linux.so.2 ]; then
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echo ${libc_lib}/lib/32/ld-linux.so.2 > $out/nix-support/dynamic-linker-m32
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fi
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''
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# The dynamic linker is passed in `ldflagsBefore' to allow
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# explicit overrides of the dynamic linker by callers to ld
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# (the *last* value counts, so ours should come first).
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+ ''
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echo -dynamic-linker "$dynamicLinker" >> $out/nix-support/libc-ldflags-before
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'') + ''
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${if targetPlatform.isDarwin then ''
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printf "export LD_DYLD_PATH=%q\n" "$dynamicLinker" >> $out/nix-support/setup-hook
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'' else ''
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if [ -e ${libc_lib}/lib/32/ld-linux.so.2 ]; then
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echo ${libc_lib}/lib/32/ld-linux.so.2 > $out/nix-support/dynamic-linker-m32
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fi
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touch $out/nix-support/ld-set-dynamic-linker
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''}
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fi
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'')
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@ -20,6 +20,7 @@ if [ -z "${NIX_BINTOOLS_WRAPPER_FLAGS_SET_@suffixSalt@:-}" ]; then
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source @out@/nix-support/add-flags.sh
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fi
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setDynamicLinker=1
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# Optionally filter out paths not refering to the store.
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expandResponseParams "$@"
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@ -47,6 +48,11 @@ if [[ "${NIX_ENFORCE_PURITY:-}" = 1 && -n "${NIX_STORE:-}"
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# Our ld is not built with sysroot support (Can we fix that?)
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:
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else
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if [[ "$p" = -static || "$p" = -static-pie ]]; then
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# Using a dynamic linker for static binaries can lead to crashes.
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# This was observed for rust binaries.
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setDynamicLinker=0
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fi
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rest+=("$p")
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fi
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n+=1
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@ -63,6 +69,11 @@ extraBefore=(${hardeningLDFlags[@]+"${hardeningLDFlags[@]}"})
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if [ -z "${NIX_LDFLAGS_SET_@suffixSalt@:-}" ]; then
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extraAfter+=($NIX_LDFLAGS_@suffixSalt@)
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extraBefore+=($NIX_LDFLAGS_BEFORE_@suffixSalt@)
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# By adding dynamic linker to extraBefore we allow the users set their
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# own dynamic linker as NIX_LD_FLAGS will override earlier set flags
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if [[ "$setDynamicLinker" = 1 && -n "$NIX_DYNAMIC_LINKER_@suffixSalt@" ]]; then
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extraBefore+=("-dynamic-linker" "$NIX_DYNAMIC_LINKER_@suffixSalt@")
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fi
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fi
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extraAfter+=($NIX_LDFLAGS_AFTER_@suffixSalt@)
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@ -134,7 +145,7 @@ then
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done
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fi
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if [ -e "@out@/nix-support/dynamic-linker-m32" ] && (( "$link32" )); then
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if [[ "$link32" = "1" && "$setDynamicLinker" = 1 && -e "@out@/nix-support/dynamic-linker-m32" ]]; then
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# We have an alternate 32-bit linker and we're producing a 32-bit ELF, let's
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# use it.
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extraAfter+=(
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@ -28,6 +28,7 @@ cc1=0
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[[ "@prog@" = *++ ]] && isCpp=1 || isCpp=0
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cppInclude=1
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cInclude=1
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setDynamicLinker=1
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expandResponseParams "$@"
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declare -i n=0
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@ -58,6 +59,8 @@ while (( "$n" < "$nParams" )); do
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cppInclude=0
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elif [ "$p" = -nostdinc++ ]; then
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cppInclude=0
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elif [[ "$p" = -static || "$p" = -static-pie ]]; then
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setDynamicLinker=0
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elif [[ "$p" != -?* ]]; then
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# A dash alone signifies standard input; it is not a flag
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nonFlagArgs=1
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@ -152,6 +155,9 @@ if [ "$dontLink" != 1 ]; then
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for i in $NIX_LDFLAGS_BEFORE_@suffixSalt@; do
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extraBefore+=("-Wl,$i")
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done
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if [[ "$setDynamicLinker" = 1 && -n "$NIX_DYNAMIC_LINKER_@suffixSalt@" ]]; then
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extraBefore+=("-Wl,-dynamic-linker=$NIX_DYNAMIC_LINKER_@suffixSalt@")
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fi
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for i in $NIX_LDFLAGS_@suffixSalt@; do
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if [ "${i:0:3}" = -L/ ]; then
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extraAfter+=("$i")
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@ -37,6 +37,9 @@ if test "$noSysDirs" = "1"; then
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# Figure out what extra flags when linking to pass to the gcc
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# compilers being generated to make sure that they use our libc.
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extraLDFlags=($(< "${!curBintools}/nix-support/libc-ldflags") $(< "${!curBintools}/nix-support/libc-ldflags-before" || true))
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if [ -e ${!curBintools}/nix-support/ld-set-dynamic-linker ]; then
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extraLDFlags=-dynamic-linker=$(< ${!curBintools}/nix-support/dynamic-linker)
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fi
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# The path to the Libc binaries such as `crti.o'.
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libc_libdir="$(< "${!curBintools}/nix-support/orig-libc")/lib"
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@ -252,7 +255,7 @@ postInstall() {
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if [[ targetConfig == *"linux"* ]]; then
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# For some reason, when building for linux on darwin, the libs retain
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# RPATH to $out.
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# RPATH to $out.
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for i in "$lib"/"$targetConfig"/lib/{libtsan,libasan,libubsan}.so.*.*.*; do
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PREV_RPATH=`patchelf --print-rpath "$i"`
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NEW_RPATH=`echo "$PREV_RPATH" | sed "s,:${out}[^:]*,,g"`
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@ -1,11 +1,13 @@
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{ stdenv }:
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{ stdenv, glibc }:
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with stdenv.lib;
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let
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# Sanitizers are not supported on Darwin.
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# Sanitizer headers aren't available in older libc++ stdenvs due to a bug
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sanitizersWorking =
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(stdenv.cc.isClang && versionAtLeast (getVersion stdenv.cc.name) "5.0.0")
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|| (stdenv.cc.isGNU && stdenv.isLinux);
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sanitizersWorking = !stdenv.hostPlatform.isMusl && (
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(stdenv.cc.isClang && versionAtLeast (getVersion stdenv.cc.name) "5.0.0")
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|| (stdenv.cc.isGNU && stdenv.isLinux)
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);
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staticLibc = optionalString (stdenv.hostPlatform.libc == "glibc") "-L ${glibc.static}/lib";
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in stdenv.mkDerivation {
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name = "cc-wrapper-test";
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@ -28,6 +30,19 @@ in stdenv.mkDerivation {
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./core-foundation-check
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''}
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${optionalString (!stdenv.isDarwin) ''
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printf "checking whether compiler builds valid static C binaries... " >&2
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$CC ${staticLibc} -static -o cc-static ${./cc-main.c}
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./cc-static
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# our glibc does not have pie enabled yet.
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${optionalString (stdenv.hostPlatform.isMusl && stdenv.cc.isGNU) ''
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printf "checking whether compiler builds valid static pie C binaries... " >&2
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$CC ${staticLibc} -static-pie -o cc-static-pie ${./cc-main.c}
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./cc-static-pie
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''}
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''}
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printf "checking whether compiler uses NIX_CFLAGS_COMPILE... " >&2
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mkdir -p foo/include
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cp ${./foo.c} foo/include/foo.h
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