-pipe reduces unnecessary disk wear for systems where /tmp is not a tmpfs, slightly increases compilation speed, and avoids leaving behind files when gcc crashes. According to the gcc manual, "this fails to work on some systems where the assembler is unable to read from a pipe; but the GNU assembler has no trouble". We already require GNU ld on all platforms, so this is not an additional dependency. LLVM as also supports pipes. -pipe has always been used for most architectures, this change standardizes it globally. Most notably, arm, arm64, riscv, and x86 are affected. Signed-off-by: Alex Xu (Hello71) <alex_y_xu@xxxxxxxx> --- Makefile | 2 +- arch/alpha/Makefile | 2 +- arch/arc/Makefile | 2 +- arch/arm/Makefile | 1 - arch/csky/Makefile | 1 - arch/ia64/Makefile | 2 +- arch/m68k/Makefile | 2 +- arch/mips/Makefile | 2 +- arch/nios2/Makefile | 2 +- arch/openrisc/Makefile | 2 +- arch/parisc/Makefile | 2 +- arch/powerpc/Makefile | 2 +- arch/s390/Makefile | 2 +- arch/sh/Makefile | 2 +- arch/sparc/Makefile | 4 ++-- arch/xtensa/Makefile | 2 +- 16 files changed, 15 insertions(+), 17 deletions(-) diff --git a/Makefile b/Makefile index aab38cb02b24..782c12267151 100644 --- a/Makefile +++ b/Makefile @@ -459,7 +459,7 @@ KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ -Werror=implicit-function-declaration -Werror=implicit-int \ -Wno-format-security \ - -std=gnu89 + -std=gnu89 -pipe KBUILD_CPPFLAGS := -D__KERNEL__ KBUILD_AFLAGS_KERNEL := KBUILD_CFLAGS_KERNEL := diff --git a/arch/alpha/Makefile b/arch/alpha/Makefile index 12dee59b011c..b40a9be72d9b 100644 --- a/arch/alpha/Makefile +++ b/arch/alpha/Makefile @@ -12,7 +12,7 @@ NM := $(NM) -B LDFLAGS_vmlinux := -static -N #-relax CHECKFLAGS += -D__alpha__ -cflags-y := -pipe -mno-fp-regs -ffixed-8 +cflags-y := -mno-fp-regs -ffixed-8 cflags-y += $(call cc-option, -fno-jump-tables) cpuflags-$(CONFIG_ALPHA_EV4) := -mcpu=ev4 diff --git a/arch/arc/Makefile b/arch/arc/Makefile index 20e9ab6cc521..b6a2f553771c 100644 --- a/arch/arc/Makefile +++ b/arch/arc/Makefile @@ -9,7 +9,7 @@ ifeq ($(CROSS_COMPILE),) CROSS_COMPILE := $(call cc-cross-prefix, arc-linux- arceb-linux-) endif -cflags-y += -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__ +cflags-y += -fno-common -fno-builtin -mmedium-calls -D__linux__ cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7 cflags-$(CONFIG_ISA_ARCV2) += -mcpu=hs38 diff --git a/arch/arm/Makefile b/arch/arm/Makefile index db857d07114f..7711467e0797 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -21,7 +21,6 @@ KBUILD_LDS_MODULE += $(srctree)/arch/arm/kernel/module.lds endif GZFLAGS :=-9 -#KBUILD_CFLAGS +=-pipe # Never generate .eh_frame KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) diff --git a/arch/csky/Makefile b/arch/csky/Makefile index fb1bbbd91954..3ba8d936122c 100644 --- a/arch/csky/Makefile +++ b/arch/csky/Makefile @@ -42,7 +42,6 @@ KBUILD_CFLAGS += -msoft-float -mdiv KBUILD_CFLAGS += -fno-tree-vectorize endif -KBUILD_CFLAGS += -pipe ifeq ($(CSKYABI),abiv2) KBUILD_CFLAGS += -mno-stack-size endif diff --git a/arch/ia64/Makefile b/arch/ia64/Makefile index 32240000dc0c..554dc20873d8 100644 --- a/arch/ia64/Makefile +++ b/arch/ia64/Makefile @@ -24,7 +24,7 @@ KBUILD_LDS_MODULE += $(srctree)/arch/ia64/module.lds KBUILD_AFLAGS_KERNEL := -mconstant-gp EXTRA := -cflags-y := -pipe $(EXTRA) -ffixed-r13 -mfixed-range=f12-f15,f32-f127 \ +cflags-y := $(EXTRA) -ffixed-r13 -mfixed-range=f12-f15,f32-f127 \ -falign-functions=32 -frename-registers -fno-optimize-sibling-calls KBUILD_CFLAGS_KERNEL := -mconstant-gp diff --git a/arch/m68k/Makefile b/arch/m68k/Makefile index 5d9288384096..99a226bbd06c 100644 --- a/arch/m68k/Makefile +++ b/arch/m68k/Makefile @@ -60,7 +60,7 @@ cpuflags-$(CONFIG_M5206) := $(call cc-option,-mcpu=5206,-m5200) KBUILD_AFLAGS += $(cpuflags-y) KBUILD_CFLAGS += $(cpuflags-y) -KBUILD_CFLAGS += -pipe -ffreestanding +KBUILD_CFLAGS += -ffreestanding ifdef CONFIG_MMU # without -fno-strength-reduce the 53c7xx.c driver fails ;-( diff --git a/arch/mips/Makefile b/arch/mips/Makefile index e1c44aed8156..05eb77328a13 100644 --- a/arch/mips/Makefile +++ b/arch/mips/Makefile @@ -95,7 +95,7 @@ all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz # machines may also. Since BFD is incredibly buggy with respect to # crossformat linking we rely on the elf2ecoff tool for format conversion. # -cflags-y += -G 0 -mno-abicalls -fno-pic -pipe +cflags-y += -G 0 -mno-abicalls -fno-pic cflags-y += -msoft-float LDFLAGS_vmlinux += -G 0 -static -n -nostdlib KBUILD_AFLAGS_MODULE += -mlong-calls diff --git a/arch/nios2/Makefile b/arch/nios2/Makefile index 52c03e60b114..3205cb5fd143 100644 --- a/arch/nios2/Makefile +++ b/arch/nios2/Makefile @@ -24,7 +24,7 @@ LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) $(KCFLAGS) -print-libgcc-file-n KBUILD_AFLAGS += -march=r$(CONFIG_NIOS2_ARCH_REVISION) -KBUILD_CFLAGS += -pipe -D__linux__ -D__ELF__ +KBUILD_CFLAGS += -D__linux__ -D__ELF__ KBUILD_CFLAGS += -march=r$(CONFIG_NIOS2_ARCH_REVISION) KBUILD_CFLAGS += $(if $(CONFIG_NIOS2_HW_MUL_SUPPORT),-mhw-mul,-mno-hw-mul) KBUILD_CFLAGS += $(if $(CONFIG_NIOS2_HW_MULX_SUPPORT),-mhw-mulx,-mno-hw-mulx) diff --git a/arch/openrisc/Makefile b/arch/openrisc/Makefile index bf10141c7426..86075fc673d9 100644 --- a/arch/openrisc/Makefile +++ b/arch/openrisc/Makefile @@ -22,7 +22,7 @@ KBUILD_DEFCONFIG := or1ksim_defconfig OBJCOPYFLAGS := -O binary -R .note -R .comment -S LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name) -KBUILD_CFLAGS += -pipe -ffixed-r10 -D__linux__ +KBUILD_CFLAGS += -ffixed-r10 -D__linux__ ifeq ($(CONFIG_OPENRISC_HAVE_INST_MUL),y) KBUILD_CFLAGS += $(call cc-option,-mhard-mul) diff --git a/arch/parisc/Makefile b/arch/parisc/Makefile index dca8f2de8cf5..88bee828400d 100644 --- a/arch/parisc/Makefile +++ b/arch/parisc/Makefile @@ -64,7 +64,7 @@ endif OBJCOPY_FLAGS =-O binary -R .note -R .comment -S -cflags-y := -pipe +cflags-y := # These flags should be implied by an hppa-linux configuration, but they # are not in gcc 3.2. diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile index f35730548e42..0550b976157c 100644 --- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -215,7 +215,7 @@ asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr) KBUILD_AFLAGS += $(AFLAGS-y) KBUILD_CFLAGS += $(call cc-option,-msoft-float) -KBUILD_CFLAGS += -pipe $(CFLAGS-y) +KBUILD_CFLAGS += $(CFLAGS-y) CPP = $(CC) -E $(KBUILD_CFLAGS) CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__ diff --git a/arch/s390/Makefile b/arch/s390/Makefile index e0e3a465bbfd..3ca3e3a29864 100644 --- a/arch/s390/Makefile +++ b/arch/s390/Makefile @@ -118,7 +118,7 @@ endif cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1) KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y) -KBUILD_CFLAGS += -pipe -Wno-sign-compare +KBUILD_CFLAGS += -Wno-sign-compare KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi) KBUILD_AFLAGS += $(aflags-y) $(cfi) export KBUILD_AFLAGS_DECOMPRESSOR diff --git a/arch/sh/Makefile b/arch/sh/Makefile index b4a86f27e048..2e224b2a436b 100644 --- a/arch/sh/Makefile +++ b/arch/sh/Makefile @@ -194,7 +194,7 @@ drivers-$(CONFIG_OPROFILE) += arch/sh/oprofile/ cflags-y += $(foreach d, $(cpuincdir-y), -I $(srctree)/arch/sh/include/$(d)) \ $(foreach d, $(machdir-y), -I $(srctree)/arch/sh/include/$(d)) -KBUILD_CFLAGS += -pipe $(cflags-y) +KBUILD_CFLAGS += $(cflags-y) KBUILD_CPPFLAGS += $(cflags-y) KBUILD_AFLAGS += $(cflags-y) diff --git a/arch/sparc/Makefile b/arch/sparc/Makefile index 4a0919581697..ad30e7e668e0 100644 --- a/arch/sparc/Makefile +++ b/arch/sparc/Makefile @@ -29,7 +29,7 @@ UTS_MACHINE := sparc # versions of gcc. Some gcc versions won't pass -Av8 to binutils when you # give -mcpu=v8. This silently worked with older bintutils versions but # does not any more. -KBUILD_CFLAGS += -m32 -mcpu=v8 -pipe -mno-fpu -fcall-used-g5 -fcall-used-g7 +KBUILD_CFLAGS += -m32 -mcpu=v8 -mno-fpu -fcall-used-g5 -fcall-used-g7 KBUILD_CFLAGS += -Wa,-Av8 KBUILD_AFLAGS += -m32 -Wa,-Av8 @@ -44,7 +44,7 @@ KBUILD_LDFLAGS := -m elf64_sparc export BITS := 64 UTS_MACHINE := sparc64 -KBUILD_CFLAGS += -m64 -pipe -mno-fpu -mcpu=ultrasparc -mcmodel=medlow +KBUILD_CFLAGS += -m64 -mno-fpu -mcpu=ultrasparc -mcmodel=medlow KBUILD_CFLAGS += -ffixed-g4 -ffixed-g5 -fcall-used-g7 -Wno-sign-compare KBUILD_CFLAGS += -Wa,--undeclared-regs KBUILD_CFLAGS += $(call cc-option,-mtune=ultrasparc3) diff --git a/arch/xtensa/Makefile b/arch/xtensa/Makefile index 67a7d151d1e7..fdaa588c504c 100644 --- a/arch/xtensa/Makefile +++ b/arch/xtensa/Makefile @@ -42,7 +42,7 @@ export PLATFORM # temporarily until string.h is fixed KBUILD_CFLAGS += -ffreestanding -D__linux__ -KBUILD_CFLAGS += -pipe -mlongcalls -mtext-section-literals +KBUILD_CFLAGS += -mlongcalls -mtext-section-literals KBUILD_CFLAGS += $(call cc-option,-mforce-no-pic,) KBUILD_CFLAGS += $(call cc-option,-mno-serialize-volatile,) -- 2.25.1
