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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 | ... Machine Dependent Options ... HPPA Options ... -threads Add support for multithreading with the dce thread library under HP-UX. This option sets flags for both the preprocessor and linker. ... IA-64 Options ... -pthread Add support for multithreading using the POSIX threads library. This option sets flags for both the preprocessor and linker. It does not affect the thread safety of object code produced by the compiler or that of libraries supplied with it. These are HP-UX specific flags. ... IBM RS /6000 and PowerPC Options ... -pthread Adds support for multithreading with the pthreads library. This option sets flags for both the preprocessor and linker. ... SPARC Options ... -threads Add support for multithreading using the Solaris threads library. This option sets flags for both the preprocessor and linker. This option does not affect the thread safety of object code produced by the compiler or that of libraries supplied with it. -pthreads Add support for multithreading using the POSIX threads library. This option sets flags for both the preprocessor and linker. This option does not affect the thread safety of object code produced by the compiler or that of libraries supplied with it. -pthread This is a synonym for -pthreads. ... |
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | ... Options for Linking ... -llibrary -l library Search the library named library when linking. (The second alternative with the library as a separate argument is only for POSIX compliance and is not recommended.) It makes a difference where in the command you write this option; the linker searches and processes libraries and object files in the order they are specified. Thus, foo.o -lz bar.o searches library z after file foo.o but before bar.o. If bar.o refers to functions in z, those functions may not be loaded. The linker searches a standard list of directories for the library, which is actually a file named liblibrary.a. The linker then uses this file as if it had been specified precisely by name. The directories searched include several standard system directories plus any that you specify with -L. Normally the files found this way are library files---archive files whose members are object files. The linker handles an archive file by scanning through it for members which define symbols that have so far been referenced but not defined. But if the file that is found is an ordinary object file , it is linked in the usual fashion. The only difference between using an -l option and specifying a file name is that -l surrounds library with lib and .a and searches several directories. |
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 | [root@Betty thread_test] # uname -a Linux Betty 2.6.32-358.el6.x86_64 #1 SMP Fri Feb 22 00:31:26 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux [root@Betty thread_test] # gcc -V gcc : ‘-V’选项必须有一个参数 [root@Betty thread_test] # gcc -v 使用内建 specs。 目标：x86_64-redhat-linux 配置为：.. /configure --prefix= /usr --mandir= /usr/share/man --infodir= /usr/share/info --with-bugurl=http: //bugzilla .redhat.com /bugzilla -- enable -bootstrap -- enable -shared -- enable -threads=posix -- enable -checking=release --with-system-zlib -- enable -__cxa_atexit --disable-libunwind-exceptions -- enable -gnu-unique-object -- enable -languages=c,c++,objc,obj-c++,java,fortran,ada -- enable -java-awt=gtk --disable-dssi --with-java-home= /usr/lib/jvm/java-1 .5.0-gcj-1.5.0.0 /jre -- enable -libgcj-multifile -- enable -java-maintainer-mode --with-ecj-jar= /usr/share/java/eclipse-ecj .jar --disable-libjava-multilib --with-ppl --with-cloog --with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux 线程模型：posix gcc 版本 4.4.7 20120313 (Red Hat 4.4.7-11) (GCC) [root@Betty thread_test] # [root@Betty thread_test] # [root@Betty thread_test] # ll 总用量 5320 -rw-r--r-- 1 root root 45125 8月 20 09:24 event.h lrwxrwxrwx 1 root root 21 8月 19 15:02 libevent-2.0.so.5 -> libevent-2.0.so.5.1.9 -rwxr-xr-x 1 root root 968698 8月 19 15:02 libevent-2.0.so.5.1.9 -rw-r--r-- 1 root root 1571978 8月 19 15:02 libevent.a lrwxrwxrwx 1 root root 26 8月 19 15:02 libevent_core-2.0.so.5 -> libevent_core-2.0.so.5.1.9 -rwxr-xr-x 1 root root 585233 8月 19 15:02 libevent_core-2.0.so.5.1.9 -rw-r--r-- 1 root root 978626 8月 19 15:02 libevent_core.a lrwxrwxrwx 1 root root 26 8月 19 15:02 libevent_core.so -> libevent_core-2.0.so.5.1.9 lrwxrwxrwx 1 root root 27 8月 19 15:02 libevent_extra-2.0.so.5 -> libevent_extra-2.0.so.5.1.9 -rwxr-xr-x 1 root root 404860 8月 19 15:02 libevent_extra-2.0.so.5.1.9 -rw-r--r-- 1 root root 593424 8月 19 15:02 libevent_extra.a lrwxrwxrwx 1 root root 27 8月 19 15:02 libevent_extra.so -> libevent_extra-2.0.so.5.1.9 lrwxrwxrwx 1 root root 29 8月 19 15:02 libevent_openssl-2.0.so.5 -> libevent_openssl-2.0.so.5.1.9 -rwxr-xr-x 1 root root 94281 8月 19 15:02 libevent_openssl-2.0.so.5.1.9 -rw-r--r-- 1 root root 131932 8月 19 15:02 libevent_openssl.a lrwxrwxrwx 1 root root 29 8月 19 15:02 libevent_openssl.so -> libevent_openssl-2.0.so.5.1.9 lrwxrwxrwx 1 root root 30 8月 19 15:02 libevent_pthreads-2.0.so.5 -> libevent_pthreads-2.0.so.5.1.9 -rwxr-xr-x 1 root root 18438 8月 19 15:02 libevent_pthreads-2.0.so.5.1.9 -rw-r--r-- 1 root root 18678 8月 19 15:02 libevent_pthreads.a lrwxrwxrwx 1 root root 30 8月 19 15:02 libevent_pthreads.so -> libevent_pthreads-2.0.so.5.1.9 lrwxrwxrwx 1 root root 21 8月 19 15:02 libevent.so -> libevent-2.0.so.5.1.9 -rw-r--r-- 1 root root 9458 8月 20 09:24 thread.h -rw-r--r-- 1 root root 757 8月 20 10:22 thread_test.c [root@Betty thread_test] # [root@Betty thread_test] # [root@Betty thread_test] # gcc thread_test.c -o thread_test_1 -levent_core -levent_pthreads -lpthread [root@Betty thread_test] # gcc thread_test.c -o thread_test_2 -levent_core -levent_pthreads -pthread [root@Betty thread_test] # gcc thread_test.c -o thread_test_3 -levent_core -levent_pthreads -pthreads gcc : 无法识别的选项‘-pthreads’ [root@Betty thread_test] # [root@Betty thread_test] # ll 总用量 5344 -rw-r--r-- 1 root root 45125 8月 20 09:24 event.h lrwxrwxrwx 1 root root 21 8月 19 15:02 libevent-2.0.so.5 -> libevent-2.0.so.5.1.9 -rwxr-xr-x 1 root root 968698 8月 19 15:02 libevent-2.0.so.5.1.9 -rw-r--r-- 1 root root 1571978 8月 19 15:02 libevent.a lrwxrwxrwx 1 root root 26 8月 19 15:02 libevent_core-2.0.so.5 -> libevent_core-2.0.so.5.1.9 -rwxr-xr-x 1 root root 585233 8月 19 15:02 libevent_core-2.0.so.5.1.9 -rw-r--r-- 1 root root 978626 8月 19 15:02 libevent_core.a lrwxrwxrwx 1 root root 26 8月 19 15:02 libevent_core.so -> libevent_core-2.0.so.5.1.9 lrwxrwxrwx 1 root root 27 8月 19 15:02 libevent_extra-2.0.so.5 -> libevent_extra-2.0.so.5.1.9 -rwxr-xr-x 1 root root 404860 8月 19 15:02 libevent_extra-2.0.so.5.1.9 -rw-r--r-- 1 root root 593424 8月 19 15:02 libevent_extra.a lrwxrwxrwx 1 root root 27 8月 19 15:02 libevent_extra.so -> libevent_extra-2.0.so.5.1.9 lrwxrwxrwx 1 root root 29 8月 19 15:02 libevent_openssl-2.0.so.5 -> libevent_openssl-2.0.so.5.1.9 -rwxr-xr-x 1 root root 94281 8月 19 15:02 libevent_openssl-2.0.so.5.1.9 -rw-r--r-- 1 root root 131932 8月 19 15:02 libevent_openssl.a lrwxrwxrwx 1 root root 29 8月 19 15:02 libevent_openssl.so -> libevent_openssl-2.0.so.5.1.9 lrwxrwxrwx 1 root root 30 8月 19 15:02 libevent_pthreads-2.0.so.5 -> libevent_pthreads-2.0.so.5.1.9 -rwxr-xr-x 1 root root 18438 8月 19 15:02 libevent_pthreads-2.0.so.5.1.9 -rw-r--r-- 1 root root 18678 8月 19 15:02 libevent_pthreads.a lrwxrwxrwx 1 root root 30 8月 19 15:02 libevent_pthreads.so -> libevent_pthreads-2.0.so.5.1.9 lrwxrwxrwx 1 root root 21 8月 19 15:02 libevent.so -> libevent-2.0.so.5.1.9 -rw-r--r-- 1 root root 9458 8月 20 09:24 thread.h -rwxr-xr-x 1 root root 8008 8月 20 15:12 thread_test_1 -rwxr-xr-x 1 root root 8008 8月 20 15:12 thread_test_2 -rwxr-xr-x 1 root root 7976 8月 20 15:12 thread_test_3 -rw-r--r-- 1 root root 757 8月 20 10:22 thread_test.c [root@Betty thread_test] # [root@Betty thread_test] # ldd thread_test_* thread_test_1: linux-vdso.so.1 => (0x00007fff4a7ff000) libevent_core-2.0.so.5 => not found libevent_pthreads-2.0.so.5 => not found libpthread.so.0 => /lib64/libpthread .so.0 (0x000000388cc00000) libc.so.6 => /lib64/libc .so.6 (0x000000388c800000) /lib64/ld-linux-x86-64 .so.2 (0x000000388c400000) thread_test_2: linux-vdso.so.1 => (0x00007fffbc3ff000) libevent_core-2.0.so.5 => not found libevent_pthreads-2.0.so.5 => not found libpthread.so.0 => /lib64/libpthread .so.0 (0x000000388cc00000) libc.so.6 => /lib64/libc .so.6 (0x000000388c800000) /lib64/ld-linux-x86-64 .so.2 (0x000000388c400000) thread_test_3: linux-vdso.so.1 => (0x00007fffef754000) libevent_core-2.0.so.5 => not found libevent_pthreads-2.0.so.5 => not found libc.so.6 => /lib64/libc .so.6 (0x000000388c800000) /lib64/ld-linux-x86-64 .so.2 (0x000000388c400000) [root@Betty thread_test] # |
| 1 2 | [root@Betty thread_test] # rpm -qf /lib64/libpthread.so.0 glibc-2.12-1.149.el6_6.9.x86_64 |
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