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我正在使用 Amazon Linux AMI，并且正在尝试运行我的捆绑安装，但出现以下错误：

使用本机扩展安装 therubyracer 0.12.2

Gem::Ext::BuildError: 错误: 无法构建 gem 原生扩展。

/usr/bin/ruby2.0 -r ./siteconf20150914-12081-ne1jzf.rb extconf.rb

检查 -lpthread 中的 main()... 是 * extconf.rb 失败 * 由于某种原因无法创建 Makefile，可能缺少必要的库和/或头文件。检查 mkmf.log 文件以获取更多详细信息。您可能需要配置选项。

…………

Gem 文件将继续安装在//gems/therubyracer-0.12.2 中以供检查。结果记录到 / /.gem/ruby/2.0/extensions/x86_64-linux/2.0/therubyracer-0.12.2/gem_make.out 安装 therubyracer (0.12.2) 时出错，Bundler 无法继续。gem install therubyracer -v '0.12.2'在捆绑之前确保成功。

但是 'gem install therubyracer -v '0.12.2' 也不起作用（同样的错误）。

在文件中：.gem/ruby/2.0/extensions/x86_64-linux/2.0/therubyracer-0.12.2/mkmf.log

have_library: checking for main() in -lpthread... -------------------- yes

"gcc -o conftest -I/usr/include/ruby/2.0 -I/usr/include/ruby/2.0/ruby/backward -I/usr/include/ruby/2.0 -I.    -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -mtune=generic -fPIC conftest.c  -L. -L/usr/lib64 -L. -fstack-protector -rdynamic -Wl,-export-dynamic  -m64   -L/usr/lib64/ruby/2.0 -lruby  -lpthread -lrt -ldl -lcrypt -lm   -lc"
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: int main(int argc, char **argv)
4: {
5:   return 0;
6: }
/* end */

"gcc -o conftest -I/usr/include/ruby/2.0 -I/usr/include/ruby/2.0/ruby/backward -I/usr/include/ruby/2.0 -I.    -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -mtune=generic -fPIC conftest.c  -L. -L/usr/lib64 -L. -fstack-protector -rdynamic -Wl,-export-dynamic  -m64   -L/usr/lib64/ruby/2.0 -lruby -lpthread  -lpthread -lrt -ldl -lcrypt -lm   -lc"
conftest.c: In function ‘t’:
conftest.c:5:57: error: ‘main’ undeclared (first use in this function)
 int t(void) { void ((*volatile p)()); p = (void ((*)()))main; return 0; }
                                                         ^
conftest.c:5:57: note: each undeclared identifier is reported only once for each function it appears in
conftest.c:5:32: warning: variable ‘p’ set but not used [-Wunused-but-set-variable]
 int t(void) { void ((*volatile p)()); p = (void ((*)()))main; return 0; }
                                ^
checked program was:
/* begin */
 1: #include "ruby.h"
 2: 
 3: /*top*/
 4: extern int t(void);
 5: int t(void) { void ((*volatile p)()); p = (void ((*)()))main; return 0; }
 6: int main(int argc, char **argv)
 7: {
 8:   if (argc > 1000000) {
 9:     printf("%p", &t);
10:   }
11: 
12:   return 0;
13: }
/* end */

"gcc -o conftest -I/usr/include/ruby/2.0 -I/usr/include/ruby/2.0/ruby/backward -I/usr/include/ruby/2.0 -I.    -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -mtune=generic -fPIC conftest.c  -L. -L/usr/lib64 -L. -fstack-protector -rdynamic -Wl,-export-dynamic  -m64   -L/usr/lib64/ruby/2.0 -lruby -lpthread  -lpthread -lrt -ldl -lcrypt -lm   -lc"
conftest.c: In function ‘t’:
conftest.c:5:1: warning: implicit declaration of function ‘main’ [-Wimplicit-function-declaration]
 int t(void) { main(); return 0; }
 ^
checked program was:
/* begin */
 1: #include "ruby.h"
 2: 
 3: /*top*/
 4: extern int t(void);
 5: int t(void) { main(); return 0; }
 6: int main(int argc, char **argv)
 7: {
 8:   if (argc > 1000000) {
 9:     printf("%p", &t);
10:   }
11: 
12:   return 0;
13: }
/* end */

我的版本：

gem -v
2.4.8
rails -v
Rails 4.2.4
ruby -v
ruby 2.0.0p647 (2015-08-18) [x86_64-linux]

有任何想法吗？

多谢你们

/克里斯

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