A link error was encountered when invoking "gccgo -static hello.go" to test a fix for gccgo [1]. The linker cannot find reference to _Unwind_Resume which is defined in libgcc_eh.a and from the "gccgo -v" and "gccgo -dumpspecs" output, I found the issue was caused by libgcc_spec being patched by the said patch
The patch was originally introduced for linaro-gcc 4.5 in 2011 commit 23e18c9 ("gcc-linaro: fix the libgcc spec to default to using the shared libgcc"). It should be not needed now as the libgcc_spec logic of since at least gcc 5.5.0 already takes that into account %{static|static-libgcc:-lgcc -lgcc_eh}%{!static:%{!static-libgcc:%{!shared-libgcc:-lgcc --as-needed -lgcc_s --no-as-needed}%{shared-libgcc:-lgcc_s%{!shared: -lgcc}}}} It should also be noted that -lgcc_eh was removed in a followed up commit c2e2651 ("toolchain: remove -lgcc_eh from the default libgcc spec, it breaks packages"), though the actual symptom was not recorded then [1] https://bugs.openwrt.org/index.php?do=details&task_id=1498 Signed-off-by: Yousong Zhou <yszhou4t...@gmail.com> --- .../gcc/patches/5.5.0/850-use_shared_libgcc.patch | 47 ------------------- .../gcc/patches/7.3.0/850-use_shared_libgcc.patch | 54 ---------------------- .../850-use_shared_libgcc.patch | 54 ---------------------- 3 files changed, 155 deletions(-) delete mode 100644 toolchain/gcc/patches/5.5.0/850-use_shared_libgcc.patch delete mode 100644 toolchain/gcc/patches/7.3.0/850-use_shared_libgcc.patch delete mode 100644 toolchain/gcc/patches/arc-2017.09-release/850-use_shared_libgcc.patch diff --git a/toolchain/gcc/patches/5.5.0/850-use_shared_libgcc.patch b/toolchain/gcc/patches/5.5.0/850-use_shared_libgcc.patch deleted file mode 100644 index 5818cf4da0..0000000000 --- a/toolchain/gcc/patches/5.5.0/850-use_shared_libgcc.patch +++ /dev/null @@ -1,47 +0,0 @@ ---- a/gcc/config/arm/linux-eabi.h -+++ b/gcc/config/arm/linux-eabi.h -@@ -131,10 +131,6 @@ - #define ENDFILE_SPEC \ - LINUX_OR_ANDROID_LD (GNU_USER_TARGET_ENDFILE_SPEC, ANDROID_ENDFILE_SPEC) - --/* Use the default LIBGCC_SPEC, not the version in linux-elf.h, as we -- do not use -lfloat. */ --#undef LIBGCC_SPEC -- - /* Clear the instruction cache from `beg' to `end'. This is - implemented in lib1funcs.S, so ensure an error if this definition - is used. */ ---- a/gcc/config/linux.h -+++ b/gcc/config/linux.h -@@ -53,6 +53,10 @@ see the files COPYING3 and COPYING.RUNTI - builtin_assert ("system=posix"); \ - } while (0) - -+#ifndef LIBGCC_SPEC -+#define LIBGCC_SPEC "%{static|static-libgcc:-lgcc}%{!static:%{!static-libgcc:-lgcc_s}}" -+#endif -+ - /* Determine which dynamic linker to use depending on whether GLIBC or - uClibc or Bionic or musl is the default C library and whether - -muclibc or -mglibc or -mbionic or -mmusl has been passed to change ---- a/libgcc/mkmap-symver.awk -+++ b/libgcc/mkmap-symver.awk -@@ -132,5 +132,5 @@ function output(lib) { - else if (inherit[lib]) - printf("} %s;\n", inherit[lib]); - else -- printf ("\n local:\n\t*;\n};\n"); -+ printf ("\n\t*;\n};\n"); - } ---- a/gcc/config/rs6000/linux.h -+++ b/gcc/config/rs6000/linux.h -@@ -60,6 +60,9 @@ - #undef CPP_OS_DEFAULT_SPEC - #define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux)" - -+#undef LIBGCC_SPEC -+#define LIBGCC_SPEC "%{!static:%{!static-libgcc:-lgcc_s}} -lgcc" -+ - #undef LINK_SHLIB_SPEC - #define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}" - diff --git a/toolchain/gcc/patches/7.3.0/850-use_shared_libgcc.patch b/toolchain/gcc/patches/7.3.0/850-use_shared_libgcc.patch deleted file mode 100644 index 1d07efed80..0000000000 --- a/toolchain/gcc/patches/7.3.0/850-use_shared_libgcc.patch +++ /dev/null @@ -1,54 +0,0 @@ -commit dcfc40358b5a3cae7320c17f8d1cebd5ad5540cd -Author: Felix Fietkau <n...@openwrt.org> -Date: Sun Feb 12 20:25:47 2012 +0000 - - gcc 4.6: port over the missing patch 850-use_shared_libgcc.patch to prevent libgcc crap from leaking into every single binary - - SVN-Revision: 30486 ---- a/gcc/config/arm/linux-eabi.h -+++ b/gcc/config/arm/linux-eabi.h -@@ -126,10 +126,6 @@ - "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s} " \ - LINUX_OR_ANDROID_LD (GNU_USER_TARGET_ENDFILE_SPEC, ANDROID_ENDFILE_SPEC) - --/* Use the default LIBGCC_SPEC, not the version in linux-elf.h, as we -- do not use -lfloat. */ --#undef LIBGCC_SPEC -- - /* Clear the instruction cache from `beg' to `end'. This is - implemented in lib1funcs.S, so ensure an error if this definition - is used. */ ---- a/gcc/config/linux.h -+++ b/gcc/config/linux.h -@@ -53,6 +53,10 @@ see the files COPYING3 and COPYING.RUNTI - builtin_assert ("system=posix"); \ - } while (0) - -+#ifndef LIBGCC_SPEC -+#define LIBGCC_SPEC "%{static|static-libgcc:-lgcc}%{!static:%{!static-libgcc:-lgcc_s}}" -+#endif -+ - /* Determine which dynamic linker to use depending on whether GLIBC or - uClibc or Bionic or musl is the default C library and whether - -muclibc or -mglibc or -mbionic or -mmusl has been passed to change ---- a/libgcc/mkmap-symver.awk -+++ b/libgcc/mkmap-symver.awk -@@ -136,5 +136,5 @@ function output(lib) { - else if (inherit[lib]) - printf("} %s;\n", inherit[lib]); - else -- printf ("\n local:\n\t*;\n};\n"); -+ printf ("\n\t*;\n};\n"); - } ---- a/gcc/config/rs6000/linux.h -+++ b/gcc/config/rs6000/linux.h -@@ -60,6 +60,9 @@ - #undef CPP_OS_DEFAULT_SPEC - #define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux)" - -+#undef LIBGCC_SPEC -+#define LIBGCC_SPEC "%{!static:%{!static-libgcc:-lgcc_s}} -lgcc" -+ - #undef LINK_SHLIB_SPEC - #define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}" - diff --git a/toolchain/gcc/patches/arc-2017.09-release/850-use_shared_libgcc.patch b/toolchain/gcc/patches/arc-2017.09-release/850-use_shared_libgcc.patch deleted file mode 100644 index 1d07efed80..0000000000 --- a/toolchain/gcc/patches/arc-2017.09-release/850-use_shared_libgcc.patch +++ /dev/null @@ -1,54 +0,0 @@ -commit dcfc40358b5a3cae7320c17f8d1cebd5ad5540cd -Author: Felix Fietkau <n...@openwrt.org> -Date: Sun Feb 12 20:25:47 2012 +0000 - - gcc 4.6: port over the missing patch 850-use_shared_libgcc.patch to prevent libgcc crap from leaking into every single binary - - SVN-Revision: 30486 ---- a/gcc/config/arm/linux-eabi.h -+++ b/gcc/config/arm/linux-eabi.h -@@ -126,10 +126,6 @@ - "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s} " \ - LINUX_OR_ANDROID_LD (GNU_USER_TARGET_ENDFILE_SPEC, ANDROID_ENDFILE_SPEC) - --/* Use the default LIBGCC_SPEC, not the version in linux-elf.h, as we -- do not use -lfloat. */ --#undef LIBGCC_SPEC -- - /* Clear the instruction cache from `beg' to `end'. This is - implemented in lib1funcs.S, so ensure an error if this definition - is used. */ ---- a/gcc/config/linux.h -+++ b/gcc/config/linux.h -@@ -53,6 +53,10 @@ see the files COPYING3 and COPYING.RUNTI - builtin_assert ("system=posix"); \ - } while (0) - -+#ifndef LIBGCC_SPEC -+#define LIBGCC_SPEC "%{static|static-libgcc:-lgcc}%{!static:%{!static-libgcc:-lgcc_s}}" -+#endif -+ - /* Determine which dynamic linker to use depending on whether GLIBC or - uClibc or Bionic or musl is the default C library and whether - -muclibc or -mglibc or -mbionic or -mmusl has been passed to change ---- a/libgcc/mkmap-symver.awk -+++ b/libgcc/mkmap-symver.awk -@@ -136,5 +136,5 @@ function output(lib) { - else if (inherit[lib]) - printf("} %s;\n", inherit[lib]); - else -- printf ("\n local:\n\t*;\n};\n"); -+ printf ("\n\t*;\n};\n"); - } ---- a/gcc/config/rs6000/linux.h -+++ b/gcc/config/rs6000/linux.h -@@ -60,6 +60,9 @@ - #undef CPP_OS_DEFAULT_SPEC - #define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux)" - -+#undef LIBGCC_SPEC -+#define LIBGCC_SPEC "%{!static:%{!static-libgcc:-lgcc_s}} -lgcc" -+ - #undef LINK_SHLIB_SPEC - #define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}" - _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/listinfo/openwrt-devel