我正在尝试在OS X中安装gem！我认为问题出在将文件连接到С。
的程度需要'mkmf'
$ CPPFLAGS＆lt;＆lt; '-D_GNU_SOURCE = 1'
have_func（'splice'，％w（fcntl.h））或中止'splice（2）未定义'
have_func（'tee'，％w（fcntl.h））或中止'tee（2）未定义'
have_func（'pipe2'，％w（fcntl.h unistd.h））
have_func（ 'rb_thread_blocking_region'）
have_func（'rb_thread_call_without_gvl'）
have_macro（'F_GETPIPE_SZ'，％w（fcntl.h））
have_macro（'F_SETPIPE_SZ'，％w（fcntl.h））
create_makefile（ 'io_splice_ext'）
gem install io_splice
错误！
Building native extensions. This could take a while...
ERROR: Error installing io_splice:
ERROR: Failed to build gem native extension.
/Users/parfenov/.rvm/rubies/ruby-1.9.3-p551/bin/ruby -r ./siteconf20151118-25778-1qyxgw.rb extconf.rb
checking for splice() in fcntl.h... no
splice(2) not defined
*** 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
--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=/Users/parfenov/.rvm/rubies/ruby-1.9.3-p551/bin/ruby
extconf failed, exit code 1
Gem files will remain installed in /Users/parfenov/.rvm/gems/ruby-1.9.3-p551/gems/io_splice-4.4.0 for inspection.
Results logged to /Users/parfenov/.rvm/gems/ruby-1.9.3-p551/extensions/x86_64-darwin-14/1.9.1/io_splice-4.4.0/gem_make.out
mkmf.log
have_func: checking for splice() in fcntl.h... -------------------- no
"/usr/local/bin/gcc-4.9 -o conftest -I/Users/parfenov/.rvm/rubies/ruby-1.9.3-p551/include/ruby-1.9.1/x86_64-darwin14.5.0 -I/Users/parfenov/.rvm/rubies/ruby-1.9.3-p551/include/ruby-1.9.1/ruby/backward -I/Users/parfenov/.rvm/rubies/ruby-1.9.3-p551/include/ruby-1.9.1 -I. -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/usr/local/opt/libyaml/include -I/usr/local/opt/readline/include -I/usr/local/opt/libksba/include -I/usr/local/opt/openssl/include -D_GNU_SOURCE=1 -O3 -ggdb -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration -fno-common -pipe conftest.c -L. -L/Users/parfenov/.rvm/rubies/ruby-1.9.3-p551/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/readline/lib -L/usr/local/opt/libksba/lib -L/usr/local/opt/openssl/lib -L. -L/usr/local/opt/libyaml/lib -L/usr/local/opt/readline/lib -L/usr/local/opt/libksba/lib -L/usr/local/opt/openssl/lib -lruby.1.9.1 -lpthread -ldl -lobjc "
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: int main(int argc, char **argv)
4: {
5: return 0;
6: }
/* end */
"/usr/local/bin/gcc-4.9 -o conftest -I/Users/parfenov/.rvm/rubies/ruby-1.9.3-p551/include/ruby-1.9.1/x86_64-darwin14.5.0 -I/Users/parfenov/.rvm/rubies/ruby-1.9.3-p551/include/ruby-1.9.1/ruby/backward -I/Users/parfenov/.rvm/rubies/ruby-1.9.3-p551/include/ruby-1.9.1 -I. -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/usr/local/opt/libyaml/include -I/usr/local/opt/readline/include -I/usr/local/opt/libksba/include -I/usr/local/opt/openssl/include -D_GNU_SOURCE=1 -O3 -ggdb -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration -fno-common -pipe conftest.c -L. -L/Users/parfenov/.rvm/rubies/ruby-1.9.3-p551/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/readline/lib -L/usr/local/opt/libksba/lib -L/usr/local/opt/openssl/lib -L. -L/usr/local/opt/libyaml/lib -L/usr/local/opt/readline/lib -L/usr/local/opt/libksba/lib -L/usr/local/opt/openssl/lib -lruby.1.9.1 -lpthread -ldl -lobjc "
conftest.c: In function 't':
conftest.c:6:53: error: 'splice' undeclared (first use in this function)
int t() { void ((*volatile p)()); p = (void ((*)()))splice; return 0; }
^
conftest.c:6:53: note: each undeclared identifier is reported only once for each function it appears in
conftest.c:6:28: warning: variable 'p' set but not used [-Wunused-but-set-variable]
int t() { void ((*volatile p)()); p = (void ((*)()))splice; return 0; }
^
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: #include <fcntl.h>
4:
5: /*top*/
6: int t() { void ((*volatile p)()); p = (void ((*)()))splice; return 0; }
7: int main(int argc, char **argv)
8: {
9: if (argc > 1000000) {
10: printf("%p", &t);
11: }
12:
13: return 0;
14: }
/* end */
"/usr/local/bin/gcc-4.9 -o conftest -I/Users/parfenov/.rvm/rubies/ruby-1.9.3-p551/include/ruby-1.9.1/x86_64-darwin14.5.0 -I/Users/parfenov/.rvm/rubies/ruby-1.9.3-p551/include/ruby-1.9.1/ruby/backward -I/Users/parfenov/.rvm/rubies/ruby-1.9.3-p551/include/ruby-1.9.1 -I. -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/usr/local/opt/libyaml/include -I/usr/local/opt/readline/include -I/usr/local/opt/libksba/include -I/usr/local/opt/openssl/include -D_GNU_SOURCE=1 -O3 -ggdb -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration -fno-common -pipe conftest.c -L. -L/Users/parfenov/.rvm/rubies/ruby-1.9.3-p551/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/readline/lib -L/usr/local/opt/libksba/lib -L/usr/local/opt/openssl/lib -L. -L/usr/local/opt/libyaml/lib -L/usr/local/opt/readline/lib -L/usr/local/opt/libksba/lib -L/usr/local/opt/openssl/lib -lruby.1.9.1 -lpthread -ldl -lobjc "
conftest.c: In function 't':
conftest.c:6:1: warning: implicit declaration of function 'splice' [-Wimplicit-function-declaration]
int t() { splice(); return 0; }
^
Undefined symbols for architecture x86_64:
"_splice", referenced from:
_t in cc2dFoEe.o
ld: symbol(s) not found for architecture x86_64
collect2: error: ld returned 1 exit status
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: #include <fcntl.h>
4:
5: /*top*/
6: int t() { splice(); return 0; }
7: int main(int argc, char **argv)
8: {
9: if (argc > 1000000) {
10: printf("%p", &t);
11: }
12:
13: return 0;
14: }
/* end */
--------------------
ruby 1.9.3