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php error: 编译过程中的错误

1. 安装编译php时出现以下错误:

ext/gd/libgd/.libs/gdkanji.o: In function `do_convert':
/root/php-5.2.12/ext/gd/libgd/gdkanji.c:350: undefined reference to `libiconv_open'
/root/php-5.2.12/ext/gd/libgd/gdkanji.c:365: undefined reference to `libiconv'
/root/php-5.2.12/ext/gd/libgd/gdkanji.c:381: undefined reference to `libiconv_close'
ext/iconv/.libs/iconv.o: In function `_php_iconv_strlen':
/root/php-5.2.12/ext/iconv/iconv.c:603: undefined reference to `libiconv_open'
/root/php-5.2.12/ext/iconv/iconv.c:626: undefined reference to `libiconv'
/root/php-5.2.12/ext/iconv/iconv.c:660: undefined reference to `libiconv_close'
ext/iconv/.libs/iconv.o: In function `php_iconv_string':
/root/php-5.2.12/ext/iconv/iconv.c:441: undefined reference to `libiconv_open'
/root/php-5.2.12/ext/iconv/iconv.c:453: undefined reference to `libiconv'
/root/php-5.2.12/ext/iconv/iconv.c:467: undefined reference to `libiconv'
/root/php-5.2.12/ext/iconv/iconv.c:478: undefined reference to `libiconv_close'
ext/iconv/.libs/iconv.o: In function `_php_iconv_strpos':
/root/php-5.2.12/ext/iconv/iconv.c:851: undefined reference to `libiconv_open'
/root/php-5.2.12/ext/iconv/iconv.c:879: undefined reference to `libiconv'
/root/php-5.2.12/ext/iconv/iconv.c:993: undefined reference to `libiconv_close'
ext/iconv/.libs/iconv.o: In function `_php_iconv_appendl':
/root/php-5.2.12/ext/iconv/iconv.c:348: undefined reference to `libiconv'
/root/php-5.2.12/ext/iconv/iconv.c:385: undefined reference to `libiconv'
ext/iconv/.libs/iconv.o: In function `_php_iconv_substr':
/root/php-5.2.12/ext/iconv/iconv.c:723: undefined reference to `libiconv_open'
/root/php-5.2.12/ext/iconv/iconv.c:747: undefined reference to `libiconv'
/root/php-5.2.12/ext/iconv/iconv.c:802: undefined reference to `libiconv_close'
/root/php-5.2.12/ext/iconv/iconv.c:806: undefined reference to `libiconv_close'
/root/php-5.2.12/ext/iconv/iconv.c:755: undefined reference to `libiconv_open'
ext/iconv/.libs/iconv.o: In function `_php_iconv_mime_decode':
/root/php-5.2.12/ext/iconv/iconv.c:1354: undefined reference to `libiconv_open'
/root/php-5.2.12/ext/iconv/iconv.c:1465: undefined reference to `libiconv_close'
/root/php-5.2.12/ext/iconv/iconv.c:1468: undefined reference to `libiconv_open'
/root/php-5.2.12/ext/iconv/iconv.c:1823: undefined reference to `libiconv_close'
/root/php-5.2.12/ext/iconv/iconv.c:1826: undefined reference to `libiconv_close'
ext/iconv/.libs/iconv.o: In function `php_iconv_stream_filter_dtor':
/root/php-5.2.12/ext/iconv/iconv.c:2465: undefined reference to `libiconv_close'
ext/iconv/.libs/iconv.o: In function `_php_iconv_mime_encode':
/root/php-5.2.12/ext/iconv/iconv.c:1043: undefined reference to `libiconv_open'
/root/php-5.2.12/ext/iconv/iconv.c:1057: undefined reference to `libiconv_open'
/root/php-5.2.12/ext/iconv/iconv.c:1316: undefined reference to `libiconv_close'
/root/php-5.2.12/ext/iconv/iconv.c:1319: undefined reference to `libiconv_close'
/root/php-5.2.12/ext/iconv/iconv.c:1176: undefined reference to `libiconv'
/root/php-5.2.12/ext/iconv/iconv.c:1128: undefined reference to `libiconv'
/root/php-5.2.12/ext/iconv/iconv.c:1160: undefined reference to `libiconv'
/root/php-5.2.12/ext/iconv/iconv.c:1319: undefined reference to `libiconv_close'
/root/php-5.2.12/ext/iconv/iconv.c:1228: undefined reference to `libiconv'
/root/php-5.2.12/ext/iconv/iconv.c:1259: undefined reference to `libiconv'
/root/php-5.2.12/ext/iconv/iconv.c:1303: undefined reference to `libiconv'
ext/iconv/.libs/iconv.o: In function `php_iconv_stream_filter_append_bucket':
/root/php-5.2.12/ext/iconv/iconv.c:2615: undefined reference to `libiconv'
/root/php-5.2.12/ext/iconv/iconv.c:2615: undefined reference to `libiconv'
ext/iconv/.libs/iconv.o:/root/php-5.2.12/ext/iconv/iconv.c:2537: more undefined references to `libiconv' follow
ext/iconv/.libs/iconv.o: In function `php_iconv_stream_filter_ctor':
/root/php-5.2.12/ext/iconv/iconv.c:2491: undefined reference to `libiconv_open'
ext/xmlrpc/libxmlrpc/.libs/encodings.o: In function `convert':
/root/php-5.2.12/ext/xmlrpc/libxmlrpc/encodings.c:73: undefined reference to `libiconv_open'
/root/php-5.2.12/ext/xmlrpc/libxmlrpc/encodings.c:81: undefined reference to `libiconv'
/root/php-5.2.12/ext/xmlrpc/libxmlrpc/encodings.c:101: undefined reference to `libiconv_close'
collect2: ld returned 1 exit status
make: *** [sapi/cli/php] ?.. 1

处理方法1

./configure ...

vi Makefile
# 找到下面这行: 
# EXTRA_LIBS = -lcrypt ... -liconv
# 在最后添加-liconv

make
make install

处理方法2

make ZEND_EXTRA_LIBS='-liconv'
make install

2. /usr/bin/ld: cannot find -lltdl

yum install libtool-ltdl-devel

3. error: Cannot find ldap libraries in /usr/lib

yum install openldap openldap-clients openldap-devel openldap-servers
cp -frp /usr/lib64/libldap* /usr/lib/

4. configure: error: Cannot find MySQL header files under yes.

yum install mysql-devel