主要明显错误“Undefined symbols for architecture x86_64”
如何让这些再次成功编译？
操作系统是Mac OS X.已从其来源安装了多个程序。安装后注意到问题：
binutils V2.25，libtool v2.4.6，glib v2.45.2，或pkgconfig v0.28在安装上述任何一个之前，重新编译libiconv和gettext没有产生错误，并且都成功安装了多次。
pkg-config --list-all不显示libiconv或gettext（如果这意味着任何重要的）
libiconv和gettext是各自网站的直接副本。
http://www.gnu.org/software/libiconv/#downloading
iconv --version
iconv (GNU libiconv 1.14)
Copyright (C) 2000-2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Written by Bruno Haible.
http://ftp.gnu.org/pub/gnu/gettext/
gettext --version
gettext (GNU gettext-runtime) 0.19.5.1
Copyright (C) 1995-1997, 2000-2007 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Written by Ulrich Drepper.
libiconv V1.14尝试在简单的libiconv文件中使用.c：
#include <iconv.h>
// works: gcc -m32 -I/usr/local/include -liconv -o test-iconv.exe test-iconv.c
// does NOT work: gcc -I/usr/local/include -liconv -o test-iconv.exe test-iconv.c
int main(int argc, char **argv) {
iconv_t conv = iconv_open("ISO8859-1", "UTF-8");
if (conv != (iconv_t) -1) {
return 0;
}
return 1;
}
如果我没有为-m32指定gcc，那么我收到以下错误：
$ gcc -I/usr/local/include -liconv -o test-iconv.exe test-iconv.c
Undefined symbols for architecture x86_64:
"_libiconv_open", referenced from:
_main in ccr9tTic.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
试图重新编译libiconv
libiconv-1.14 $ make distclean; ./configure --enable-extra-encodings \
--with-libiconv-prefix=/usr/local/include; make V=1
...
...
...
gcc -DHAVE_CONFIG_H -DEXEEXT=\"\" -I. -I.. -I../lib -I../intl \
-DDEPENDS_ON_LIBICONV=1 -D DEPENDS_ON_LIBINTL=1 -I/usr/local/include \
-g -O2 -c strerror-override.c
rm -f libicrt.a
ar cru libicrt.a allocator.o areadlink.o careadlinkat.o malloca.o progname.o \
safe-read.o width.o xmalloc.o xstrdup.o xreadlink.o canonicalize-lgpl.o \
error.o lstat.o readlink.o stat.o strerror.o strerror-override.o
ranlib libicrt.a
cd src && make all
gcc -c -I. -I. -I.. -I../include -I./../include -I../srclib -I./../srclib \
-I../lib -g -O2 -I/usr/local/include -DINSTALLDIR=\"/usr/local/bin\" \
-DLOCALEDIR=\"/usr/local/share/locale\" ./iconv_no_i18n.c
/bin/sh ../libtool --mode=link gcc -g -O2 iconv_no_i18n.o \
../srclib/libicrt.a ../lib/libiconv.la -o iconv_no_i18n
libtool: link: gcc -g -O2 iconv_no_i18n.o -o .libs/iconv_no_i18n \
../srclib/libicrt.a ../lib/.libs/libiconv.dylib
ld: warning: ignoring file ../srclib/libicrt.a, file was built for archive
which is not the architecture being linked (x86_64): ../srclib/libicrt.a
Undefined symbols for architecture x86_64:
"_program_name", referenced from:
_main in iconv_no_i18n.o
_usage in iconv_no_i18n.o
_error in iconv_no_i18n.o
"_rpl_strerror", referenced from:
_error in iconv_no_i18n.o
"_safe_read", referenced from:
_convert in iconv_no_i18n.o
"_set_program_name", referenced from:
_main in iconv_no_i18n.o
"_uc_width", referenced from:
_update_line_column in iconv_no_i18n.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
make[1]: *** [iconv_no_i18n] Error 1
make: *** [all] Error 2
lipo的信息：architecture being linked (x86_64): ../srclib/libicrt.a
libiconv-1.14 $ lipo -info srclib/libicrt.a
input file srclib/libicrt.a is not a fat file
Non-fat file: srclib/libicrt.a is architecture: x86_64
gettext v0.19.5.1gettext-0.19.5.1 $ make distclean; ./configure; make V=1
...
...
...
libtool: link: ( cd ".libs" && rm -f "libgnu.la" && ln -s "../libgnu.la" \
"libgnu.la" )
Making all in src
gcc -DLOCALEDIR=\"/usr/local/share/locale\" -DHAVE_CONFIG_H -I. -I.. -I. \
-I. -I.. -I../intl -I./../intl -I../gnulib-lib -I./../gnulib-lib \
-I/usr/local/include -DINSTALLDIR=\"/usr/local/bin\" -g -O2 -c -o \
gettext-gettext.o `test -f 'gettext.c' || echo './'`gettext.c
/bin/sh ../libtool --tag=CC --mode=link gcc \
-DINSTALLDIR=\"/usr/local/bin\" -g -O2 -o gettext gettext-gettext.o \
../gnulib-lib/libgrt.a ../intl/libintl.la -L/usr/local/lib -liconv \
-R/usr/local/lib -Wl,-framework -Wl,CoreFoundation -L/usr/local/lib \
-liconv -R/usr/local/lib
libtool: link: gcc -DINSTALLDIR=\"/usr/local/bin\" -g -O2 -o .libs/gettext \
gettext-gettext.o -Wl,-framework -Wl,CoreFoundation \
../gnulib-lib/libgrt.a ../intl/.libs/libintl.dylib -L/usr/local/lib \
-lc /usr/local/lib/libiconv.dylib
ld: warning: ignoring file ../gnulib-lib/libgrt.a, file was built for archive
which is not the architecture being linked (x86_64): ../gnulib-lib/libgrt.a
Undefined symbols for architecture x86_64:
"_close_stdout", referenced from:
_main in gettext-gettext.o
"_error", referenced from:
_main in gettext-gettext.o
"_gnu_basename", referenced from:
_main in gettext-gettext.o "_program_name", referenced from:
_main in gettext-gettext.o
_usage in gettext-gettext.o
"_proper_name", referenced from:
_main in gettext-gettext.o
"_rpl_getopt_long", referenced from:
_main in gettext-gettext.o
"_rpl_optarg", referenced from:
_main in gettext-gettext.o
"_rpl_optind", referenced from:
_main in gettext-gettext.o
"_set_program_name", referenced from:
_main in gettext-gettext.o
"_xmalloc", referenced from:
_expand_escape in gettext-gettext.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
make[4]: *** [gettext] Error 1
make[3]: *** [all-recursive] Error 1
make[2]: *** [all] Error 2
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2
lipo的信息architecture being linked (x86_64): ../gnulib-lib/libgrt.a
gettext-0.19.5.1 $ lipo -info gettext-runtime/gnulib-lib/libgrt.a
input file gettext-runtime/gnulib-lib/libgrt.a is not a fat file
Non-fat file: gettext-runtime/gnulib-lib/libgrt.a is architecture: x86_64
可能是您安装了gcc和ar的替代版本，并且它们位于标准位置（/ usr / bin）之前的路径中。
我过去遇到过同样的问题，这篇文章帮助我排除故障并修复：https://www.unix.com/programming/253809-linker-errors-linking-files-os-x.html