我已经按照步骤安装了 v8 和libv8 gem。之后，我无法成功安装therubyracer 0.12.3。mkmf.log 在尝试验证 v8.h 标头时阻塞并抛出unknown type name错误。
我的环境：
- 拼音：2.6.3
- OSX：10.15
- xcode-select： 2373
- libv8： 3.16.14.19
- v8：v8@3.15 (通过自制软件( 冲泡信息 v8@3.15 = v8@3.15：稳定 3.15.11.18(瓶装([仅限桶]
- g++：苹果叮当版本 11.0.0 (clang-1100.0.33.17(
我已经完成了这里的建议。有人有建议吗？
宝石安装
gem install therubyracer -v '0.12.3' -- --with-v8-dir=/usr/local/opt/v8@3.15
失败消息
Building native extensions with: '--with-v8-dir=/usr/local/opt/v8@3.15'
This could take a while...
ERROR: Error installing therubyracer:
ERROR: Failed to build gem native extension.
current directory: /Users/kristinsmith/.gem/ruby/2.6.0/gems/therubyracer-0.12.3/ext/v8
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby -I
/Library/Ruby/Site/2.6.0 -r ./siteconf20200120-16109-4pdf22.rb extconf.rb --with-v8-
dir=/usr/local/opt/v8@3.15
checking for -lpthread... yes
checking for -lobjc... yes
checking for v8.h... no
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers. Check the mkmf.log file for more details. You may
need configuration options.
Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/$(RUBY_BASE_NAME)
--with-pthreadlib
--without-pthreadlib
--with-objclib
--without-objclib
--enable-debug
--disable-debug
--with-v8-dir
--with-v8-include
--without-v8-include=${v8-dir}/include
--with-v8-lib
--without-v8-lib=${v8-dir}/lib
/Users/kristinsmith/.gem/ruby/2.6.0/gems/libv8-3.16.14.19/ext/libv8/location.rb:50:in
`configure': By using --with-system-v8, you have chosen to use the version
(Libv8::Location::System::NotFoundError)
of V8 found on your system and *not* the one that is bundled with
the libv8 rubygem.
However, your system version of v8 could not be located.
Please make sure your system version of v8 that is compatible
with 3.16.14.19 installed. You may need to use the
--with-v8-dir option if it is installed in a non-standard location
from /Users/kristinsmith/.gem/ruby/2.6.0/gems/libv8-3.16.14.19/lib/libv8.rb:7:in
`configure_makefile'
from extconf.rb:32:in `<main>'
To see why this extension failed to compile, please check the mkmf.log which can be found here:
/Users/kristinsmith/.gem/ruby/2.6.0/extensions/universal-darwin-19/2.6.0/therubyracer-
0.12.3/mkmf.log
extconf failed, exit code 1
Gem files will remain installed in /Users/kristinsmith/.gem/ruby/2.6.0/gems/therubyracer-
0.12.3 for inspection.
Results logged to /Users/kristinsmith/.gem/ruby/2.6.0/extensions/universal-darwin .
19/2.6.0/therubyracer-0.12.3/gem_make.out
麦克姆.log
...
find_header: checking for v8.h... -------------------- no
"xcrun clang I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.
5.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/include/ruby-2.6.0/universal-darwin19 -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/include/ruby-2.6.0/ruby/backward -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/include/ruby-2.6.0 -I. -I/usr/local/opt/v8@3.15/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT -Wall -g -rdynamic -g -Os -pipe -DHAVE_GCC_ATOMIC_BUILTINS -arch x86_64 -c conftest.c"
clang: warning: argument unused during compilation: '-rdynamic' [-Wunused-command-line-argument]
In file included from conftest.c:3:
/usr/local/opt/v8@3.15/include/v8.h:98:1: error: unknown type name 'namespace' namespace v8
{
^
/usr/local/opt/v8@3.15/include/v8.h:98:13: error: expected ';' after top level declarator
namespace v8 {
^
;
2 errors generated.
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: #include <v8.h>
/* end */
--------------------
...
我遇到了同样的错误，最后似乎忽略了 rbenv ruby 版本。 运行eval "$(rbenv init -)"解决了问题，并且正确安装了 therubyracer。
非常感谢您的帮助！最终的解决方案是：
- 安装 rbenv
- 在 rbenv 中设置 Ruby 版本 (2.6.3(
- 将以下行添加到我的 .zshrc 中：
- eval "$(rbenv init -(" (谢谢， Mykolas Kairys(
- export LDFLAGS="-L~/.rbenv/versions/2.6.3/lib">
- export CPPFLAGS="-I~/.rbenv/versions/2.6.3/include">