From 2babed4a50fcd050abc4686e05e24d0e374d10a8 Mon Sep 17 00:00:00 2001 From: Thomas Petazzoni Date: Mon, 2 Sep 2013 18:06:29 +0200 Subject: [PATCH] toolchain-internal: skip gcc-intermediate when possible When NPTL support was introduced, gcc required a three stages build process. Since gcc 4.7, this is no longer necessary, and it is possible to get back to a two stages build process. This patch takes advantage of this, by doing a two stages build process when possible. We introduce a few hidden kconfig options: * BR2_GCC_VERSION_NEEDS_THREE_STAGE_BUILD, which is set by the gcc Config.in logic to indicate that the compiler might need a three stages build. Currently, all versions prior to 4.7.x are selecting this kconfig option. * BR2_TOOLCHAIN_LIBC_NEEDS_THREE_STAGE_BUILD, which indicates whether the C library might need a three stages build. This is the case for eglibc, and uClibc when NPTL is enabled. * BR2_TOOLCHAIN_NEEDS_THREE_STAGE_BUILD finally is enabled when both of the previous options are enabled. It indicates that a three stages build is actually needed. In addition to those options, the uClibc/gcc build logic is changed to use only a two stages build process when possible. Signed-off-by: Thomas Petazzoni Signed-off-by: Peter Korsgaard --- package/eglibc/eglibc.mk | 5 +++-- package/gcc/Config.in.host | 11 +++++++++++ package/gcc/gcc-initial/gcc-initial.mk | 8 ++++++++ package/uclibc/Config.in | 1 + package/uclibc/uclibc.mk | 5 +++-- toolchain/Config.in | 9 +++++++++ 6 files changed, 35 insertions(+), 4 deletions(-) diff --git a/package/eglibc/eglibc.mk b/package/eglibc/eglibc.mk index fe12299afc..0ed908d398 100644 --- a/package/eglibc/eglibc.mk +++ b/package/eglibc/eglibc.mk @@ -14,8 +14,9 @@ EGLIBC_LICENSE_FILES = libc/COPYING libc/COPYING.LIB libc/LICENSES # cross-compiler and the kernel headers EGLIBC_DEPENDENCIES = host-gcc-initial linux-headers host-gawk -# Before eglibc is built, we must have the second stage cross-compiler -eglibc-build: host-gcc-intermediate +# Before eglibc is built, we must have the second stage +# cross-compiler, for some gcc versions +eglibc-build: $(if $(BR2_TOOLCHAIN_NEEDS_THREE_STAGE_BUILD),host-gcc-intermediate) EGLIBC_SUBDIR = build diff --git a/package/gcc/Config.in.host b/package/gcc/Config.in.host index a6acaa25c6..7e6df2d9e6 100644 --- a/package/gcc/Config.in.host +++ b/package/gcc/Config.in.host @@ -3,6 +3,12 @@ comment "GCC Options" config BR2_GCC_NEEDS_MPC bool +# Until gcc 4.7, a three stage build process was needed when using +# NPTL. This hidden option tells whether gcc is a version that +# requires this three stage build process. +config BR2_GCC_VERSION_NEEDS_THREE_STAGE_BUILD + bool + choice prompt "GCC compiler Version" default BR2_GCC_VERSION_4_4_X if BR2_sparc_sparchfleon || BR2_sparc_sparchfleonv8 || BR2_sparc_sparcsfleon || BR2_sparc_sparcsfleonv8 @@ -16,11 +22,13 @@ choice config BR2_GCC_VERSION_4_2_2_AVR32_2_1_5 depends on BR2_avr32 bool "gcc 4.2.2-avr32-2.1.5" + select BR2_GCC_VERSION_NEEDS_THREE_STAGE_BUILD config BR2_GCC_VERSION_4_3_X depends on !BR2_arc && !BR2_avr32 && !BR2_sparc_sparchfleon && !BR2_sparc_sparchfleonv8 && !BR2_sparc_sparcsfleon && !BR2_sparc_sparcsfleonv8 && !BR2_cortex_a5 && !BR2_cortex_a7 && !BR2_cortex_a8 && !BR2_cortex_a9 && !BR2_cortex_a15 && !BR2_x86_atom && !BR2_powerpc_e300c2 && !BR2_powerpc_e300c3 && !BR2_powerpc_e500mc && !BR2_powerpc_464 && !BR2_powerpc_464fp && !BR2_powerpc_476 && !BR2_powerpc_476fp && !BR2_fa526 && !BR2_pj4 depends on !BR2_ARM_EABIHF bool "gcc 4.3.x" + select BR2_GCC_VERSION_NEEDS_THREE_STAGE_BUILD config BR2_GCC_VERSION_4_4_X depends on !BR2_arc && !BR2_avr32 && !BR2_cortex_a5 && !BR2_cortex_a7 && !BR2_cortex_a15 && !BR2_x86_atom && !BR2_powerpc_476 && !BR2_powerpc_476fp && !BR2_fa526 && !BR2_pj4 @@ -29,6 +37,7 @@ choice depends on !BR2_ARM_EABIHF # VFPv4 support appeared in gcc 4.5 depends on !BR2_ARM_FPU_VFPV4 && !BR2_ARM_FPU_VFPV4D16 + select BR2_GCC_VERSION_NEEDS_THREE_STAGE_BUILD config BR2_GCC_VERSION_4_5_X depends on !BR2_arc && !BR2_avr32 && !BR2_cortex_a7 && !BR2_cortex_a15 && !BR2_sparc_sparchfleon && !BR2_sparc_sparchfleonv8 && !BR2_sparc_sparcsfleon && !BR2_sparc_sparcsfleonv8 && !BR2_fa526 && !BR2_pj4 @@ -36,11 +45,13 @@ choice # ARM EABIhf support appeared in gcc 4.6 depends on !BR2_ARM_EABIHF bool "gcc 4.5.x" + select BR2_GCC_VERSION_NEEDS_THREE_STAGE_BUILD config BR2_GCC_VERSION_4_6_X depends on !BR2_arc && !BR2_avr32 && !BR2_bfin && !BR2_cortex_a7 && !BR2_sparc_sparchfleon && !BR2_sparc_sparchfleonv8 && !BR2_sparc_sparcsfleon && !BR2_sparc_sparcsfleonv8 && !BR2_pj4 select BR2_GCC_NEEDS_MPC bool "gcc 4.6.x" + select BR2_GCC_VERSION_NEEDS_THREE_STAGE_BUILD config BR2_GCC_VERSION_4_7_X depends on !BR2_arc && !BR2_avr32 && !BR2_bfin && !BR2_sparc_sparchfleon && !BR2_sparc_sparchfleonv8 && !BR2_sparc_sparcsfleon && !BR2_sparc_sparcsfleonv8 && !BR2_pj4 diff --git a/package/gcc/gcc-initial/gcc-initial.mk b/package/gcc/gcc-initial/gcc-initial.mk index 0eb492fa4d..83767ea509 100644 --- a/package/gcc/gcc-initial/gcc-initial.mk +++ b/package/gcc/gcc-initial/gcc-initial.mk @@ -29,6 +29,7 @@ HOST_GCC_INITIAL_CONF_OPT = \ --enable-languages=c \ --disable-shared \ --without-headers \ + --disable-threads \ --with-newlib \ --disable-largefile \ --disable-nls \ @@ -40,4 +41,11 @@ HOST_GCC_INITIAL_CONF_ENV = \ HOST_GCC_INITIAL_MAKE_OPT = all-gcc HOST_GCC_INITIAL_INSTALL_OPT = install-gcc +ifeq ($(BR2_TOOLCHAIN_NEEDS_THREE_STAGE_BUILD),) +ifeq ($(BR2_GCC_SUPPORTS_FINEGRAINEDMTUNE),y) +HOST_GCC_INITIAL_MAKE_OPT += all-target-libgcc +HOST_GCC_INITIAL_INSTALL_OPT += install-target-libgcc +endif +endif + $(eval $(host-autotools-package)) diff --git a/package/uclibc/Config.in b/package/uclibc/Config.in index 92e04e9d61..037ca01c0d 100644 --- a/package/uclibc/Config.in +++ b/package/uclibc/Config.in @@ -115,6 +115,7 @@ choice config BR2_PTHREADS_NATIVE bool "Native POSIX Threading (NPTL)" select BR2_TOOLCHAIN_HAS_THREADS + select BR2_TOOLCHAIN_LIBC_NEEDS_THREE_STAGE_BUILD depends on !BR2_arc depends on !BR2_avr32 depends on !BR2_bfin diff --git a/package/uclibc/uclibc.mk b/package/uclibc/uclibc.mk index 39877bbbf9..181a772fb3 100644 --- a/package/uclibc/uclibc.mk +++ b/package/uclibc/uclibc.mk @@ -22,8 +22,9 @@ UCLIBC_INSTALL_STAGING = YES # cross-compiler and the kernel headers UCLIBC_DEPENDENCIES = host-gcc-initial linux-headers -# Before uClibc is built, we must have the second stage cross-compiler -uclibc-build: host-gcc-intermediate +# Before uClibc is built, we must have the second stage +# cross-compiler, for some gcc versions, and when NPTL is used. +uclibc-build: $(if $(BR2_TOOLCHAIN_NEEDS_THREE_STAGE_BUILD),host-gcc-intermediate) # specifying UCLIBC_CONFIG_FILE on the command-line overrides the .config # setting. diff --git a/toolchain/Config.in b/toolchain/Config.in index 9d1e68f8fc..27f7b50bc1 100644 --- a/toolchain/Config.in +++ b/toolchain/Config.in @@ -1,5 +1,13 @@ menu "Toolchain" +config BR2_TOOLCHAIN_NEEDS_THREE_STAGE_BUILD + bool + default y if BR2_TOOLCHAIN_LIBC_NEEDS_THREE_STAGE_BUILD && \ + BR2_GCC_VERSION_NEEDS_THREE_STAGE_BUILD + +config BR2_TOOLCHAIN_LIBC_NEEDS_THREE_STAGE_BUILD + bool + # Should be selected for glibc or eglibc config BR2_TOOLCHAIN_USES_GLIBC bool @@ -10,6 +18,7 @@ config BR2_TOOLCHAIN_USES_GLIBC select BR2_TOOLCHAIN_HAS_THREADS select BR2_TOOLCHAIN_HAS_THREADS_DEBUG select BR2_TOOLCHAIN_HAS_SHADOW_PASSWORDS + select BR2_TOOLCHAIN_LIBC_NEEDS_THREE_STAGE_BUILD config BR2_TOOLCHAIN_USES_UCLIBC bool -- 2.30.2