From 519d83bfa0442439026db4e71e605a5c1347e566 Mon Sep 17 00:00:00 2001 From: Thomas Petazzoni Date: Wed, 27 Apr 2016 15:54:03 +0200 Subject: [PATCH] gcc: add support for gcc 6 This commit adds the support for gcc 6. This release allows to remove a large number of our gcc patches, mainly thanks to the Xtensa and musl related patches being merged upstream. Patches kept with no changes: 100-uclibc-conf.patch 301-missing-execinfo_h.patch 810-arm-softfloat-libgcc.patch 830-arm_unbreak_armv4t.patch 840-microblaze-enable-dwarf-eh-support.patch 860-cilk-wchar.patch 890-fix-m68k-compile.patch Patches dropped because they have been merged upstream, or were already upstream backports: 120-gcc-config.gcc-fix-typo-for-powerpc-e6500-cpu_is_64b.patch (merged) 850-libstdcxx-uclibc-c99.patch (merged in a different form, see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58393) 870-xtensa-add-mauto-litpools-option.patch (upstream backport) 871-xtensa-reimplement-register-spilling.patch (upstream backport) 872-xtensa-use-unwind-dw2-fde-dip-instead-of-unwind-dw2-.patch (upstream backport) 873-xtensa-fix-_Unwind_GetCFA.patch (upstream backport) 874-xtensa-add-uclinux-support.patch (upstream backport) 900-libitm-fixes-for-musl-support.patch (upstream backport) 901-fixincludes-update-for-musl-support.patch (upstream backport) 902-unwind-fix-for-musl.patch (upstream backport) 903-libstdc++-libgfortran-gthr-workaround-for-musl.patch (upstream backport) 904-musl-libc-config.patch (upstream backport) 905-add-musl-support-to-gcc.patch (upstream backport) 905-add-musl-support-to-gcc.patch (upstream backport) 906-mips-musl-support.patch (upstream backport) 907-x86-musl-support.patch (upstream backport) 908-arm-musl-support.patch (upstream backport) 909-aarch64-musl-support.patch (upstream backport) Successfully build-time and run-time tested with qemu_arm_vexpress_defconfig, using gcc 6.x, both in uClibc and musl configurations. Signed-off-by: Thomas Petazzoni Signed-off-by: Peter Korsgaard --- package/gcc/6.1.0/100-uclibc-conf.patch | 15 ++ .../gcc/6.1.0/301-missing-execinfo_h.patch | 13 ++ .../gcc/6.1.0/810-arm-softfloat-libgcc.patch | 30 ++++ .../gcc/6.1.0/830-arm_unbreak_armv4t.patch | 15 ++ ...0-microblaze-enable-dwarf-eh-support.patch | 166 ++++++++++++++++++ package/gcc/6.1.0/860-cilk-wchar.patch | 56 ++++++ package/gcc/6.1.0/890-fix-m68k-compile.patch | 15 ++ package/gcc/Config.in.host | 9 + package/gcc/gcc.hash | 2 + toolchain/toolchain-common.in | 5 + 10 files changed, 326 insertions(+) create mode 100644 package/gcc/6.1.0/100-uclibc-conf.patch create mode 100644 package/gcc/6.1.0/301-missing-execinfo_h.patch create mode 100644 package/gcc/6.1.0/810-arm-softfloat-libgcc.patch create mode 100644 package/gcc/6.1.0/830-arm_unbreak_armv4t.patch create mode 100644 package/gcc/6.1.0/840-microblaze-enable-dwarf-eh-support.patch create mode 100644 package/gcc/6.1.0/860-cilk-wchar.patch create mode 100644 package/gcc/6.1.0/890-fix-m68k-compile.patch diff --git a/package/gcc/6.1.0/100-uclibc-conf.patch b/package/gcc/6.1.0/100-uclibc-conf.patch new file mode 100644 index 0000000000..73d1f0d3a9 --- /dev/null +++ b/package/gcc/6.1.0/100-uclibc-conf.patch @@ -0,0 +1,15 @@ +Index: b/contrib/regression/objs-gcc.sh +=================================================================== +--- a/contrib/regression/objs-gcc.sh ++++ b/contrib/regression/objs-gcc.sh +@@ -106,6 +106,10 @@ + then + make all-gdb all-dejagnu all-ld || exit 1 + make install-gdb install-dejagnu install-ld || exit 1 ++elif [ $H_REAL_TARGET = $H_REAL_HOST -a $H_REAL_TARGET = i686-pc-linux-uclibc ] ++ then ++ make all-gdb all-dejagnu all-ld || exit 1 ++ make install-gdb install-dejagnu install-ld || exit 1 + elif [ $H_REAL_TARGET = $H_REAL_HOST ] ; then + make bootstrap || exit 1 + make install || exit 1 diff --git a/package/gcc/6.1.0/301-missing-execinfo_h.patch b/package/gcc/6.1.0/301-missing-execinfo_h.patch new file mode 100644 index 0000000000..2d0e7baa44 --- /dev/null +++ b/package/gcc/6.1.0/301-missing-execinfo_h.patch @@ -0,0 +1,13 @@ +Index: b/boehm-gc/include/gc.h +=================================================================== +--- a/boehm-gc/include/gc.h ++++ b/boehm-gc/include/gc.h +@@ -503,7 +503,7 @@ + #if defined(__linux__) || defined(__GLIBC__) + # include + # if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1 || __GLIBC__ > 2) \ +- && !defined(__ia64__) ++ && !defined(__ia64__) && !defined(__UCLIBC__) + # ifndef GC_HAVE_BUILTIN_BACKTRACE + # define GC_HAVE_BUILTIN_BACKTRACE + # endif diff --git a/package/gcc/6.1.0/810-arm-softfloat-libgcc.patch b/package/gcc/6.1.0/810-arm-softfloat-libgcc.patch new file mode 100644 index 0000000000..5efa7fd1bc --- /dev/null +++ b/package/gcc/6.1.0/810-arm-softfloat-libgcc.patch @@ -0,0 +1,30 @@ +Index: b/gcc/config/arm/linux-elf.h +=================================================================== +--- a/gcc/config/arm/linux-elf.h ++++ b/gcc/config/arm/linux-elf.h +@@ -60,7 +60,7 @@ + %{shared:-lc} \ + %{!shared:%{profile:-lc_p}%{!profile:-lc}}" + +-#define LIBGCC_SPEC "%{mfloat-abi=soft*:-lfloat} -lgcc" ++#define LIBGCC_SPEC "-lgcc" + + #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2" + +Index: b/libgcc/config/arm/t-linux +=================================================================== +--- a/libgcc/config/arm/t-linux ++++ b/libgcc/config/arm/t-linux +@@ -1,6 +1,11 @@ + LIB1ASMSRC = arm/lib1funcs.S + LIB1ASMFUNCS = _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_lnx _clzsi2 _clzdi2 \ +- _ctzsi2 _arm_addsubdf3 _arm_addsubsf3 ++ _ctzsi2 _arm_addsubdf3 _arm_addsubsf3 \ ++ _arm_addsubdf3 _arm_addsubsf3 \ ++ _arm_negdf2 _arm_muldivdf3 _arm_cmpdf2 _arm_unorddf2 \ ++ _arm_fixdfsi _arm_fixunsdfsi _arm_truncdfsf2 \ ++ _arm_negsf2 _arm_muldivsf3 _arm_cmpsf2 _arm_unordsf2 \ ++ _arm_fixsfsi _arm_fixunssfsi + + # Just for these, we omit the frame pointer since it makes such a big + # difference. diff --git a/package/gcc/6.1.0/830-arm_unbreak_armv4t.patch b/package/gcc/6.1.0/830-arm_unbreak_armv4t.patch new file mode 100644 index 0000000000..b730059183 --- /dev/null +++ b/package/gcc/6.1.0/830-arm_unbreak_armv4t.patch @@ -0,0 +1,15 @@ +http://sourceware.org/ml/crossgcc/2008-05/msg00009.html + +Index: b/gcc/config/arm/linux-eabi.h +=================================================================== +--- a/gcc/config/arm/linux-eabi.h ++++ b/gcc/config/arm/linux-eabi.h +@@ -45,7 +45,7 @@ + The ARM10TDMI core is the default for armv5t, so set + SUBTARGET_CPU_DEFAULT to achieve this. */ + #undef SUBTARGET_CPU_DEFAULT +-#define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm10tdmi ++#define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm9tdmi + + /* TARGET_BIG_ENDIAN_DEFAULT is set in + config.gcc for big endian configurations. */ diff --git a/package/gcc/6.1.0/840-microblaze-enable-dwarf-eh-support.patch b/package/gcc/6.1.0/840-microblaze-enable-dwarf-eh-support.patch new file mode 100644 index 0000000000..81bf60a1a9 --- /dev/null +++ b/package/gcc/6.1.0/840-microblaze-enable-dwarf-eh-support.patch @@ -0,0 +1,166 @@ +Fetched from Xilinx gcc git at https://github.com/Xilinx/gcc + +From 23c35173490ac2d6348a668dfc9c1a6eb62171f2 Mon Sep 17 00:00:00 2001 +From: "Edgar E. Iglesias" +Date: Mon, 18 Jun 2012 20:18:13 +0200 +Subject: [PATCH] [Patch, microblaze]: Enable DWARF exception handling support. + +Changelog + +2013-03-18 Edgar E. Iglesias + David Holsgrove + + * common/config/microblaze/microblaze-common.c: Remove + TARGET_EXCEPT_UNWIND_INFO definition. + * config/microblaze/microblaze-protos.h: Add + microblaze_eh_return prototype. + * gcc/config/microblaze/microblaze.c: (microblaze_must_save_register, + microblaze_expand_epilogue, microblaze_return_addr): Handle + calls_eh_return + (microblaze_eh_return): New function. + * gcc/config/microblaze/microblaze.h: Define RETURN_ADDR_OFFSET, + EH_RETURN_DATA_REGNO, MB_EH_STACKADJ_REGNUM, EH_RETURN_STACKADJ_RTX, + ASM_PREFERRED_EH_DATA_FORMAT + * gcc/config/microblaze/microblaze.md: Define eh_return pattern. + +Signed-off-by: David Holsgrove +Signed-off-by: Edgar E. Iglesias +--- + gcc/common/config/microblaze/microblaze-common.c | 3 --- + gcc/config/microblaze/microblaze-protos.h | 1 + + gcc/config/microblaze/microblaze.c | 29 ++++++++++++++++++++---- + gcc/config/microblaze/microblaze.h | 15 ++++++++++++ + gcc/config/microblaze/microblaze.md | 11 +++++++++ + 5 files changed, 52 insertions(+), 7 deletions(-) + +Index: b/gcc/common/config/microblaze/microblaze-common.c +=================================================================== +--- a/gcc/common/config/microblaze/microblaze-common.c ++++ b/gcc/common/config/microblaze/microblaze-common.c +@@ -37,7 +37,4 @@ + #undef TARGET_OPTION_OPTIMIZATION_TABLE + #define TARGET_OPTION_OPTIMIZATION_TABLE microblaze_option_optimization_table + +-#undef TARGET_EXCEPT_UNWIND_INFO +-#define TARGET_EXCEPT_UNWIND_INFO sjlj_except_unwind_info +- + struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER; +Index: b/gcc/config/microblaze/microblaze-protos.h +=================================================================== +--- a/gcc/config/microblaze/microblaze-protos.h ++++ b/gcc/config/microblaze/microblaze-protos.h +@@ -57,6 +57,7 @@ + extern int symbol_mentioned_p (rtx); + extern int label_mentioned_p (rtx); + extern bool microblaze_cannot_force_const_mem (machine_mode, rtx); ++extern void microblaze_eh_return (rtx op0); + #endif /* RTX_CODE */ + + /* Declare functions in microblaze-c.c. */ +Index: b/gcc/config/microblaze/microblaze.c +=================================================================== +--- a/gcc/config/microblaze/microblaze.c ++++ b/gcc/config/microblaze/microblaze.c +@@ -1924,6 +1924,11 @@ + if (frame_pointer_needed && (regno == HARD_FRAME_POINTER_REGNUM)) + return 1; + ++ if (crtl->calls_eh_return ++ && regno == MB_ABI_SUB_RETURN_ADDR_REGNUM) { ++ return 1; ++ } ++ + if (!crtl->is_leaf) + { + if (regno == MB_ABI_SUB_RETURN_ADDR_REGNUM) +@@ -1951,6 +1956,13 @@ + return 1; + } + ++ if (crtl->calls_eh_return ++ && (regno == EH_RETURN_DATA_REGNO (0) ++ || regno == EH_RETURN_DATA_REGNO (1))) ++ { ++ return 1; ++ } ++ + return 0; + } + +@@ -3027,6 +3039,12 @@ + emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, fsiz_rtx)); + } + ++ if (crtl->calls_eh_return) ++ emit_insn (gen_addsi3 (stack_pointer_rtx, ++ stack_pointer_rtx, ++ gen_rtx_raw_REG (SImode, ++ MB_EH_STACKADJ_REGNUM))); ++ + emit_jump_insn (gen_return_internal (gen_rtx_REG (Pmode, GP_REG_FIRST + + MB_ABI_SUB_RETURN_ADDR_REGNUM))); + } +@@ -3324,10 +3342,13 @@ + if (count != 0) + return NULL_RTX; + +- return gen_rtx_PLUS (Pmode, +- get_hard_reg_initial_val (Pmode, +- MB_ABI_SUB_RETURN_ADDR_REGNUM), +- GEN_INT (8)); ++ return get_hard_reg_initial_val (Pmode, ++ MB_ABI_SUB_RETURN_ADDR_REGNUM); ++} ++ ++void microblaze_eh_return (rtx op0) ++{ ++ emit_insn (gen_movsi(gen_rtx_MEM(Pmode, stack_pointer_rtx), op0)); + } + + /* Queue an .ident string in the queue of top-level asm statements. +Index: b/gcc/config/microblaze/microblaze.h +=================================================================== +--- a/gcc/config/microblaze/microblaze.h ++++ b/gcc/config/microblaze/microblaze.h +@@ -184,6 +184,21 @@ + #define INCOMING_RETURN_ADDR_RTX \ + gen_rtx_REG (VOIDmode, GP_REG_FIRST + MB_ABI_SUB_RETURN_ADDR_REGNUM) + ++/* Specifies the offset from INCOMING_RETURN_ADDR_RTX and the actual return PC. */ ++#define RETURN_ADDR_OFFSET (8) ++ ++/* Describe how we implement __builtin_eh_return. */ ++#define EH_RETURN_DATA_REGNO(N) (((N) < 2) ? MB_ABI_FIRST_ARG_REGNUM + (N) : INVALID_REGNUM) ++ ++#define MB_EH_STACKADJ_REGNUM MB_ABI_INT_RETURN_VAL2_REGNUM ++#define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, MB_EH_STACKADJ_REGNUM) ++ ++/* Select a format to encode pointers in exception handling data. CODE ++ is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is ++ true if the symbol may be affected by dynamic relocations. */ ++#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \ ++ ((flag_pic || GLOBAL) ? DW_EH_PE_aligned : DW_EH_PE_absptr) ++ + /* Use DWARF 2 debugging information by default. */ + #define DWARF2_DEBUGGING_INFO + #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG +Index: b/gcc/config/microblaze/microblaze.md +=================================================================== +--- a/gcc/config/microblaze/microblaze.md ++++ b/gcc/config/microblaze/microblaze.md +@@ -2324,4 +2324,15 @@ + (set_attr "mode" "SI") + (set_attr "length" "4")]) + ++; This is used in compiling the unwind routines. ++(define_expand "eh_return" ++ [(use (match_operand 0 "general_operand" ""))] ++ "" ++ " ++{ ++ microblaze_eh_return(operands[0]); ++ DONE; ++}") ++ + (include "sync.md") ++ diff --git a/package/gcc/6.1.0/860-cilk-wchar.patch b/package/gcc/6.1.0/860-cilk-wchar.patch new file mode 100644 index 0000000000..1d9916f554 --- /dev/null +++ b/package/gcc/6.1.0/860-cilk-wchar.patch @@ -0,0 +1,56 @@ +[PATCH] cilk: fix build without wchar + +When building against uClibc with wchar support disabled, WCHAR_MIN and +WCHAR_MAX are not defined leading to compilation errors. + +Fix it by only including the wchar code if available. + +Signed-off-by: Peter Korsgaard +--- + libcilkrts/include/cilk/reducer_min_max.h | 8 ++++++++ + 1 file changed, 8 insertions(+) + +Index: b/libcilkrts/include/cilk/reducer_min_max.h +=================================================================== +--- a/libcilkrts/include/cilk/reducer_min_max.h ++++ b/libcilkrts/include/cilk/reducer_min_max.h +@@ -3154,7 +3154,9 @@ + CILK_C_REDUCER_MAX_INSTANCE(char, char, CHAR_MIN) + CILK_C_REDUCER_MAX_INSTANCE(unsigned char, uchar, 0) + CILK_C_REDUCER_MAX_INSTANCE(signed char, schar, SCHAR_MIN) ++#ifdef WCHAR_MIN + CILK_C_REDUCER_MAX_INSTANCE(wchar_t, wchar_t, WCHAR_MIN) ++#endif + CILK_C_REDUCER_MAX_INSTANCE(short, short, SHRT_MIN) + CILK_C_REDUCER_MAX_INSTANCE(unsigned short, ushort, 0) + CILK_C_REDUCER_MAX_INSTANCE(int, int, INT_MIN) +@@ -3306,7 +3308,9 @@ + CILK_C_REDUCER_MAX_INDEX_INSTANCE(char, char, CHAR_MIN) + CILK_C_REDUCER_MAX_INDEX_INSTANCE(unsigned char, uchar, 0) + CILK_C_REDUCER_MAX_INDEX_INSTANCE(signed char, schar, SCHAR_MIN) ++#ifdef WCHAR_MIN + CILK_C_REDUCER_MAX_INDEX_INSTANCE(wchar_t, wchar_t, WCHAR_MIN) ++#endif + CILK_C_REDUCER_MAX_INDEX_INSTANCE(short, short, SHRT_MIN) + CILK_C_REDUCER_MAX_INDEX_INSTANCE(unsigned short, ushort, 0) + CILK_C_REDUCER_MAX_INDEX_INSTANCE(int, int, INT_MIN) +@@ -3432,7 +3436,9 @@ + CILK_C_REDUCER_MIN_INSTANCE(char, char, CHAR_MAX) + CILK_C_REDUCER_MIN_INSTANCE(unsigned char, uchar, CHAR_MAX) + CILK_C_REDUCER_MIN_INSTANCE(signed char, schar, SCHAR_MAX) ++#ifdef WCHAR_MAX + CILK_C_REDUCER_MIN_INSTANCE(wchar_t, wchar_t, WCHAR_MAX) ++#endif + CILK_C_REDUCER_MIN_INSTANCE(short, short, SHRT_MAX) + CILK_C_REDUCER_MIN_INSTANCE(unsigned short, ushort, USHRT_MAX) + CILK_C_REDUCER_MIN_INSTANCE(int, int, INT_MAX) +@@ -3584,7 +3590,9 @@ + CILK_C_REDUCER_MIN_INDEX_INSTANCE(char, char, CHAR_MAX) + CILK_C_REDUCER_MIN_INDEX_INSTANCE(unsigned char, uchar, CHAR_MAX) + CILK_C_REDUCER_MIN_INDEX_INSTANCE(signed char, schar, SCHAR_MAX) ++#ifdef WCHAR_MAX + CILK_C_REDUCER_MIN_INDEX_INSTANCE(wchar_t, wchar_t, WCHAR_MAX) ++#endif + CILK_C_REDUCER_MIN_INDEX_INSTANCE(short, short, SHRT_MAX) + CILK_C_REDUCER_MIN_INDEX_INSTANCE(unsigned short, ushort, USHRT_MAX) + CILK_C_REDUCER_MIN_INDEX_INSTANCE(int, int, INT_MAX) diff --git a/package/gcc/6.1.0/890-fix-m68k-compile.patch b/package/gcc/6.1.0/890-fix-m68k-compile.patch new file mode 100644 index 0000000000..6e63de0cd1 --- /dev/null +++ b/package/gcc/6.1.0/890-fix-m68k-compile.patch @@ -0,0 +1,15 @@ +remove unused header, which breaks the toolchain building + +Signed-off-by: Waldemar Brodkorb + +diff -Nur gcc-5.3.0.orig/libgcc/config/m68k/linux-atomic.c gcc-5.3.0/libgcc/config/m68k/linux-atomic.c +--- gcc-5.3.0.orig/libgcc/config/m68k/linux-atomic.c 2015-01-05 13:33:28.000000000 +0100 ++++ gcc-5.3.0/libgcc/config/m68k/linux-atomic.c 2016-03-19 09:25:07.000000000 +0100 +@@ -33,7 +33,6 @@ + using the kernel helper defined below. There is no support for + 64-bit operations yet. */ + +-#include + #include + + #ifndef __NR_atomic_cmpxchg_32 diff --git a/package/gcc/Config.in.host b/package/gcc/Config.in.host index 48457086f4..8cf2d56ef7 100644 --- a/package/gcc/Config.in.host +++ b/package/gcc/Config.in.host @@ -79,6 +79,14 @@ choice select BR2_GCC_SUPPORTS_GRAPHITE select BR2_TOOLCHAIN_GCC_AT_LEAST_5 + config BR2_GCC_VERSION_6_X + bool "gcc 6.x" + # Broken or unsupported architectures + depends on !BR2_arc + select BR2_GCC_NEEDS_MPC + select BR2_GCC_SUPPORTS_GRAPHITE + select BR2_TOOLCHAIN_GCC_AT_LEAST_6 + endchoice config BR2_GCC_SUPPORTS_FINEGRAINEDMTUNE @@ -91,6 +99,7 @@ config BR2_GCC_VERSION default "4.8.5" if BR2_GCC_VERSION_4_8_X default "4.9.3" if BR2_GCC_VERSION_4_9_X default "5.3.0" if BR2_GCC_VERSION_5_X + default "6.1.0" if BR2_GCC_VERSION_6_X default "arc-2015.12" if BR2_GCC_VERSION_4_8_ARC config BR2_EXTRA_GCC_CONFIG_OPTIONS diff --git a/package/gcc/gcc.hash b/package/gcc/gcc.hash index 0ef4e65f05..8d2feaf1a4 100644 --- a/package/gcc/gcc.hash +++ b/package/gcc/gcc.hash @@ -8,5 +8,7 @@ sha512 47fdfeca0c0a624cdec9c4ae47137d056c918d5c386d4b96985bb3c8172aba377cb66cbc sha512 9ac57377a6975fc7adac704ec81355262b9f537def6955576753b87715470a20ee6a2a3144a79cc8fcba3443f7b44c7337d79d704b522d053f54f79aa6b442df gcc-4.9.3.tar.bz2 # From ftp://gcc.gnu.org/pub/gcc/releases/gcc-5.3.0/sha512.sum sha512 d619847383405fd389f5a2d7225f97fedb01f81478dbb8339047ccba7561a5c20045ab500a8744bffd19ea51892ce09fc37f862f2cfcb42de0f0f8cd8f8da37a gcc-5.3.0.tar.bz2 +# From ftp://gcc.gnu.org/pub/gcc/releases/gcc-6.1.0/sha512.sum +sha512 eeed3e2018b8c012aabce419e8d718fde701e5c3c179b4486c61ba46e5736eecc8fccdd18b01fcd973a42c6ad3116dbbe2ee247fe3757d622d373f93ebaf8d2e gcc-6.1.0.tar.bz2 # No hash for the ARC variant, comes from the github-helper: none xxx gcc-arc-2015.12.tar.gz diff --git a/toolchain/toolchain-common.in b/toolchain/toolchain-common.in index 00d73b6715..be02484a76 100644 --- a/toolchain/toolchain-common.in +++ b/toolchain/toolchain-common.in @@ -304,10 +304,15 @@ config BR2_TOOLCHAIN_GCC_AT_LEAST_5 bool select BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 +config BR2_TOOLCHAIN_GCC_AT_LEAST_6 + bool + select BR2_TOOLCHAIN_GCC_AT_LEAST_5 + # This order guarantees that the highest version is set, as kconfig # stops affecting a value on the first matching default. config BR2_TOOLCHAIN_GCC_AT_LEAST string + default "6" if BR2_TOOLCHAIN_GCC_AT_LEAST_6 default "5" if BR2_TOOLCHAIN_GCC_AT_LEAST_5 default "4.9" if BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 default "4.8" if BR2_TOOLCHAIN_GCC_AT_LEAST_4_8 -- 2.30.2