diff --git Makefile.in Makefile.in index 36e369d..2f1b928 100644 --- Makefile.in +++ Makefile.in @@ -643,6 +643,20 @@ all: @host_makefile_frag@ ### +# Allow host makefile fragment to override PIE settings. +ifneq ($(STAGE1_NO_PIE_CFLAGS),) + HOST_EXPORTS += export NO_PIE_CFLAGS="$(STAGE1_NO_PIE_CFLAGS)"; +endif +ifneq ($(STAGE1_NO_PIE_FLAG),) + HOST_EXPORTS += export NO_PIE_FLAG="$(STAGE1_NO_PIE_FLAG)"; +endif +ifneq ($(BOOT_NO_PIE_CFLAGS),) + POSTSTAGE1_HOST_EXPORTS += export NO_PIE_CFLAGS="$(BOOT_NO_PIE_CFLAGS)"; +endif +ifneq ($(BOOT_NO_PIE_FLAG),) + POSTSTAGE1_HOST_EXPORTS += export NO_PIE_FLAG="$(BOOT_NO_PIE_FLAG)"; +endif + # This is the list of directories that may be needed in RPATH_ENVVAR # so that programs built for the target machine work. TARGET_LIB_PATH = $(TARGET_LIB_PATH_libstdc++-v3)$(TARGET_LIB_PATH_libsanitizer)$(TARGET_LIB_PATH_libvtv)$(TARGET_LIB_PATH_liboffloadmic)$(TARGET_LIB_PATH_libssp)$(TARGET_LIB_PATH_libphobos)$(TARGET_LIB_PATH_libgomp)$(TARGET_LIB_PATH_libitm)$(TARGET_LIB_PATH_libatomic)$(HOST_LIB_PATH_gcc) diff --git config/mh-darwin config/mh-darwin index 148b730..08ce540 100644 --- config/mh-darwin +++ config/mh-darwin @@ -1,29 +1,33 @@ # The -mdynamic-no-pic ensures that the compiler executable is built without -# position-independent-code -- the usual default on Darwin. This fix speeds -# compiles by 3-5%. Don't add it if the compiler doesn't also support -# -mno-dynamic-no-pic to undo it. -DARWIN_MDYNAMIC_NO_PIC := \ -`case ${host} in i?86-*-darwin* | powerpc-*-darwin*) \ - $(CC) -S -xc /dev/null -o /dev/null -mno-dynamic-no-pic 2>/dev/null \ - && echo -mdynamic-no-pic ;; esac` -DARWIN_GCC_MDYNAMIC_NO_PIC := \ -`case ${host} in i?86-*-darwin* | powerpc-*-darwin*) \ - $(CC) -S -xc /dev/null -o /dev/null -mno-dynamic-no-pic 2>/dev/null \ - || echo -mdynamic-no-pic ;; esac` +# position-independent-code -- the usual default on Darwin. This speeds compiles +# by 8-20% (measurements made against GCC-11). Do not add it if the buulding +# compiler doesn't also support -mno-dynamic-no-pic to undo it, since libiberty, +# at least, needs this facility -# ld on Darwin versions >= 10.7 defaults to PIE executables. Disable this for -# gcc components, since it is incompatible with our pch implementation. -DARWIN_NO_PIE := `case ${host} in *-*-darwin[1][1-9]*) echo -Wl,-no_pie ;; esac;` +# In addition, all versions of clang released to date treat -fno-PIE in -m32 +# compilations as switching PIC code off too, which means that -fno-PIE, without +# -mdynamic-no-pic produces broken relocations (and we cannot enable mdynamic-no-pic +# because the inverse setting doesn't work). -BOOT_CFLAGS += $(DARWIN_MDYNAMIC_NO_PIC) -BOOT_LDFLAGS += $(DARWIN_NO_PIE) +CAN_MDYNAMIC_NO_PIC := \ +`$(CC) -S -xc /dev/null -o /dev/null -mno-dynamic-no-pic 2>/dev/null \ + && ($(CC) -E -dM -xc /dev/null | grep -q __clang__ || echo true)` -# Similarly, for cross-compilation. -STAGE1_CFLAGS += $(DARWIN_MDYNAMIC_NO_PIC) -STAGE1_LDFLAGS += $(DARWIN_NO_PIE) +# Here we use STAGE1 to mean both bootstrap and for the no-bootstrap single compile. +ifeq ($(CAN_MDYNAMIC_NO_PIC),true) +STAGE1_NO_PIE_CFLAGS = -fno-PIE +else +STAGE1_NO_PIE_CFLAGS = -fno-PIE -fPIC +endif -# Without -mno-dynamic-no-pic support, add -mdynamic-no-pic just to later -# stages when we know it is built with gcc. -STAGE2_CFLAGS += $(DARWIN_GCC_MDYNAMIC_NO_PIC) -STAGE3_CFLAGS += $(DARWIN_GCC_MDYNAMIC_NO_PIC) -STAGE4_CFLAGS += $(DARWIN_GCC_MDYNAMIC_NO_PIC) +@if gcc-bootstrap +# Add -mdynamic-no-pic to later stages when we know it is built with GCC. +STAGE2_CFLAGS += -mdynamic-no-pic +STAGE3_CFLAGS += -mdynamic-no-pic +STAGE4_CFLAGS += -mdynamic-no-pic +# For GCC, this is compatible with mdynamic-no-pic. +BOOT_NO_PIE_CFLAGS = -fno-PIE +@endif gcc-bootstrap + +STAGE1_NO_PIE_FLAG = -Wl,-no_pie +BOOT_NO_PIE_FLAG = -Wl,-no_pie diff --git gcc/configure gcc/configure index 8fe9c91..42524b3 100755 --- gcc/configure +++ gcc/configure @@ -30739,7 +30739,7 @@ fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_c_no_fpie" >&5 $as_echo "$gcc_cv_c_no_fpie" >&6; } if test "$gcc_cv_c_no_fpie" = "yes"; then - NO_PIE_CFLAGS="-fno-PIE" + NO_PIE_CFLAGS=${NO_PIE_CFLAGS-"-fno-PIE"} fi @@ -30767,7 +30767,7 @@ fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_no_pie" >&5 $as_echo "$gcc_cv_no_pie" >&6; } if test "$gcc_cv_no_pie" = "yes"; then - NO_PIE_FLAG="-no-pie" + NO_PIE_FLAG=${NO_PIE_FLAG-"-no-pie"} fi diff --git gcc/configure.ac gcc/configure.ac index 84dceb8..1950345 100644 --- gcc/configure.ac +++ gcc/configure.ac @@ -6841,7 +6841,7 @@ AC_CACHE_CHECK([for -fno-PIE option], [gcc_cv_c_no_fpie=no]) CXXFLAGS="$saved_CXXFLAGS"]) if test "$gcc_cv_c_no_fpie" = "yes"; then - NO_PIE_CFLAGS="-fno-PIE" + NO_PIE_CFLAGS=${NO_PIE_CFLAGS-"-fno-PIE"} fi AC_SUBST([NO_PIE_CFLAGS]) @@ -6855,7 +6855,7 @@ AC_CACHE_CHECK([for -no-pie option], [gcc_cv_no_pie=no]) LDFLAGS="$saved_LDFLAGS"]) if test "$gcc_cv_no_pie" = "yes"; then - NO_PIE_FLAG="-no-pie" + NO_PIE_FLAG=${NO_PIE_FLAG-"-no-pie"} fi AC_SUBST([NO_PIE_FLAG])