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我正在使用 crosstool-ng 1.24.0 构建 gccgo。编译非常简单的 main.go 时出现链接器错误。知道如何解决这个问题吗？任何指向成功构建 gogcc 的指针，即使对于可以轻松验证的不同流行目标也是如此？

主机是 ubuntu 18.04 和 gcc 7.3.0。crosstool-ng 目标是 x86_64-ubuntu16.04-linux-gnu，它应该使用 glibc 2.23 创建 gcc 8.3.0。

以下是缺少的符号：

undefined reference to `__morestack_block_signals'
undefined reference to `__generic_morestack'
undefined reference to `__morestack_unblock_signals'
undefined reference to `__morestack_block_signals'
undefined reference to `__generic_releasestack'
undefined reference to `__generic_findstack'
undefined reference to `__generic_morestack_set_initial_sp'
undefined reference to `__morestack_load_mmap'

构建步骤的更多细节：

[1] 查看 crosstool-ng。它的主人现在在 1.24.0 上。

[2] 运行这些命令来构建一个普通的 c 和 c++ 工具链：

./bootstrap
./configure --enable-local
make
./ct-ng show-x86_64-ubuntu16.04-linux-gnu
./ct-ng x86_64-ubuntu16.04-linux-gnu
./ct-ng build

[3] 通过编译一个 hello-world 程序并运行来验证 gcc 是否工作。

[4] 编辑脚本以启用 go。补丁看起来像：

diff --git a/scripts/build/cc/gcc.sh b/scripts/build/cc/gcc.sh
@@ -597,7 +597,7 @@ do_gcc_core_backend() {
-        --enable-languages="${lang_list}"              \
+        --enable-languages="${lang_list},go"              \
@@ -903,7 +903,7 @@ do_gcc_backend() {
-    extra_config+=("--enable-languages=${lang_list}")
+    extra_config+=("--enable-languages=${lang_list},go")

[5]./ct-ng build再次运行。

[6] 编译一个非常简单的main.go：

// main.go
package main

import "fmt"
func main() {
    fmt.Printf("Ok, ok, this is exactly perfect!\n")
}

使用命令：

PATH=${HOME}/x-tools/x86_64-ubuntu16.04-linux-gnu/bin/:${PATH}
export PATH

x86_64-ubuntu16.04-linux-gnu-gccgo -o main main.go

得到这些错误：

~/x-tools/x86_64-ubuntu16.04-linux-gnu/x86_64-ubuntu16.04-linux-gnu/bin/ld:
~/x-tools/x86_64-ubuntu16.04-linux-gnu/lib/gcc/x86_64-ubuntu16.04-linux-gnu/8.3.0/libgcc.a(morestack.o): 
in function `__morestack':

~/crosstool-ng/.build/x86_64-ubuntu16.04-linux-gnu/src/gcc/libgcc/config/i386/morestack.S:504:
undefined reference to `__morestack_block_signals'

~/x-tools/x86_64-ubuntu16.04-linux-gnu/x86_64-ubuntu16.04-linux-gnu/bin/ld:
~/crosstool-ng/.build/x86_64-ubuntu16.04-linux-gnu/src/gcc/libgcc/config/i386/morestack.S:512:
undefined reference to `__generic_morestack'

~/x-tools/x86_64-ubuntu16.04-linux-gnu/x86_64-ubuntu16.04-linux-gnu/bin/ld:
~/crosstool-ng/.build/x86_64-ubuntu16.04-linux-gnu/src/gcc/libgcc/config/i386/morestack.S:531:
undefined reference to `__morestack_unblock_signals'

~/x-tools/x86_64-ubuntu16.04-linux-gnu/x86_64-ubuntu16.04-linux-gnu/bin/ld:
~/crosstool-ng/.build/x86_64-ubuntu16.04-linux-gnu/src/gcc/libgcc/config/i386/morestack.S:556:
undefined reference to `__morestack_block_signals'

~/x-tools/x86_64-ubuntu16.04-linux-gnu/x86_64-ubuntu16.04-linux-gnu/bin/ld:
~/crosstool-ng/.build/x86_64-ubuntu16.04-linux-gnu/src/gcc/libgcc/config/i386/morestack.S:562:
undefined reference to `__generic_releasestack'

~/x-tools/x86_64-ubuntu16.04-linux-gnu/x86_64-ubuntu16.04-linux-gnu/bin/ld:
~/crosstool-ng/.build/x86_64-ubuntu16.04-linux-gnu/src/gcc/libgcc/config/i386/morestack.S:588:
undefined reference to `__morestack_unblock_signals'

~/x-tools/x86_64-ubuntu16.04-linux-gnu/x86_64-ubuntu16.04-linux-gnu/bin/ld:
~/crosstool-ng/.build/x86_64-ubuntu16.04-linux-gnu/src/gcc/libgcc/config/i386/morestack.S:609:
undefined reference to `__generic_findstack'

~/x-tools/x86_64-ubuntu16.04-linux-gnu/x86_64-ubuntu16.04-linux-gnu/bin/ld:
~/x-tools/x86_64-ubuntu16.04-linux-gnu/lib/gcc/x86_64-ubuntu16.04-linux-gnu/8.3.0/libgcc.a(morestack.o):
in function `__stack_split_initialize':

~/crosstool-ng/.build/x86_64-ubuntu16.04-linux-gnu/src/gcc/libgcc/config/i386/morestack.S:758:
undefined reference to `__generic_morestack_set_initial_sp'

~/x-tools/x86_64-ubuntu16.04-linux-gnu/lib/gcc/x86_64-ubuntu16.04-linux-gnu/8.3.0/../../../../x86_64-ubuntu16.04-linux-gnu/bin/ld:
~/x-tools/x86_64-ubuntu16.04-linux-gnu/lib/gcc/x86_64-ubuntu16.04-linux-gnu/8.3.0/libgcc.a(morestack.o):
(.ctors.65535+0x8):
undefined reference to `__morestack_load_mmap'

collect2: error: ld returned 1 exit status
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