in reply to Re: Detect library in Makefile.PL
in thread Detect library in Makefile.PL

Devel::CheckLib looks promising, but it silently converts gcc's compiling errors to "Can't link/include": 
use strict;
use warnings;
use Devel::CheckLib;

our $debug ||= 0;

my @headers = qw ( php_main.h );
my @incpath = qw(
  /usr/local/include
  /usr/local/include/php
  /usr/local/include/php/main
  /usr/local/include/php/TSRM
  /usr/local/include/php/Zend
  /usr/local/include/php/ext
  /usr/local/include/php/ext/date/lib
);

check_lib_or_exit(
  header  => \@headers,
  incpath => \@incpath,
  debug   => $debug,
);
__END__

[download]
$ perl -sl devel.checklib.pl
Can't link/include 'php_main.h'
$ perl -sl devel.checklib.pl -debug 1
# /usr/bin/gcc assertlibSu6peu8p.c -I/usr/local/include -I/usr/local/i
+nclude/php -I/usr/local/include/php/main -I/usr/local/include/php/TSR
+M -I/usr/local/include/php/Zend -I/usr/local/include/php/ext -I/usr/l
+ocal/include/php/ext/date/lib -o assertlib27VD0sdi
In file included from /usr/local/include/php/Zend/zend_globals.h:28,
                 from /usr/local/include/php/main/php_main.h:25,
                 from assertlibSu6peu8p.c:1:
/usr/local/include/php/Zend/zend_globals_macros.h: In function `BEGIN_
+EXTERN_C':/usr/local/include/php/Zend/zend_globals_macros.h:37: error
+: storage class specified for parameter `ZEND_API'
/usr/local/include/php/Zend/zend_globals_macros.h:37: error: syntax er
+ror before "struct"

[download]
/usr/local/include/php/Zend/zend_globals_macros.h:47: error: storage c
+lass specified for parameter `ZEND_API'
/usr/local/include/php/Zend/zend_globals_macros.h:47: error: redefinit
+ion of parameter 'ZEND_API'
/usr/local/include/php/Zend/zend_globals_macros.h:37: error: previous 
+definition of 'ZEND_API' was here
/usr/local/include/php/Zend/zend_globals_macros.h:47: error: syntax er
+ror before "zend_executor_globals"
/usr/local/include/php/Zend/zend_globals_macros.h:56: error: storage c
+lass specified for parameter `ZEND_API'
/usr/local/include/php/Zend/zend_globals_macros.h:56: error: redefinit
+ion of parameter 'ZEND_API'
/usr/local/include/php/Zend/zend_globals_macros.h:47: error: previous 
+definition of 'ZEND_API' was here
/usr/local/include/php/Zend/zend_globals_macros.h:56: error: syntax er
+ror before "zend_scanner_globals"
/usr/local/include/php/Zend/zend_globals_macros.h:66: error: storage c
+lass specified for parameter `ZEND_API'
/usr/local/include/php/Zend/zend_globals_macros.h:66: error: redefinit
+ion of parameter 'ZEND_API'
/usr/local/include/php/Zend/zend_globals_macros.h:56: error: previous 
+definition of 'ZEND_API' was here
/usr/local/include/php/Zend/zend_globals_macros.h:66: error: syntax er
+ror before "zend_scanner_globals"
In file included from /usr/local/include/php/Zend/zend_globals.h:30,
                 from /usr/local/include/php/main/php_main.h:25,
                 from assertlibSu6peu8p.c:1:
/usr/local/include/php/Zend/zend_stack.h:28: error: syntax error befor
+e '}' token
In file included from /usr/local/include/php/Zend/zend_globals.h:31,
                 from /usr/local/include/php/main/php_main.h:25,
                 from assertlibSu6peu8p.c:1:
/usr/local/include/php/Zend/zend_ptr_stack.h:27: error: redefinition o
+f parameter 'elements'
/usr/local/include/php/Zend/zend_stack.h:27: error: previous definitio
+n of 'elements' was here
/usr/local/include/php/Zend/zend_ptr_stack.h:29: error: syntax error b
+efore '}' token
In file included from /usr/include/sys/types.h:31,
                 from /usr/local/include/php/Zend/zend_hash.h:25,
                 from /usr/local/include/php/Zend/zend_globals.h:32,
                 from /usr/local/include/php/main/php_main.h:25,
                 from assertlibSu6peu8p.c:1:
/usr/include/bits/types.h:34: error: storage class specified for param
+eter `__u_char'
/usr/include/bits/types.h:35: error: storage class specified for param
+eter `__u_short'
/usr/include/bits/types.h:36: error: storage class specified for param
+eter `__u_int'
/usr/include/bits/types.h:37: error: storage class specified for param
+eter `__u_long'
/usr/include/bits/types.h:40: error: storage class specified for param
+eter `__int8_t'
/usr/include/bits/types.h:41: error: storage class specified for param
+eter `__uint8_t'
/usr/include/bits/types.h:42: error: storage class specified for param
+eter `__int16_t'
/usr/include/bits/types.h:43: error: storage class specified for param
+eter `__uint16_t'
/usr/include/bits/types.h:44: error: storage class specified for param
+eter `__int32_t'
/usr/include/bits/types.h:45: error: storage class specified for param
+eter `__uint32_t'
/usr/include/bits/types.h:50: error: syntax error before "__extension_
+_"
In file included from /usr/include/sys/types.h:31,
                 from /usr/local/include/php/Zend/zend_hash.h:25,
                 from /usr/local/include/php/Zend/zend_globals.h:32,
                 from /usr/local/include/php/main/php_main.h:25,
                 from assertlibSu6peu8p.c:1:
/usr/include/bits/types.h:186: error: storage class specified for para
+meter `__off64_t'
/usr/include/bits/types.h:186: error: syntax error before "__loff_t"
/usr/include/bits/types.h:187: error: storage class specified for para
+meter `__quad_t'
/usr/include/bits/types.h:187: error: syntax error before '*' token
/usr/include/bits/types.h:188: error: storage class specified for para
+meter `__caddr_t'
/usr/include/bits/types.h:191: error: syntax error before "__extension
+__"
In file included from /usr/local/include/php/Zend/zend_hash.h:25,
                 from /usr/local/include/php/Zend/zend_globals.h:32,
                 from /usr/local/include/php/main/php_main.h:25,
                 from assertlibSu6peu8p.c:1:
/usr/include/sys/types.h:35: error: storage class specified for parame
+ter `__u_char'
/usr/include/sys/types.h:35: error: conflicting types for '__u_char'
/usr/include/bits/types.h:34: error: previous definition of '__u_char'
+ was here
/usr/include/sys/types.h:35: error: syntax error before "u_char"
/usr/include/sys/types.h:36: error: storage class specified for parame
+ter `__u_short'
/usr/include/sys/types.h:36: error: conflicting types for '__u_short'
/usr/include/bits/types.h:35: error: previous definition of '__u_short
+' was here/usr/include/sys/types.h:36: error: syntax error before "u_
+short"
/usr/include/sys/types.h:37: error: storage class specified for parame
+ter `__u_int'
/usr/include/sys/types.h:37: error: conflicting types for '__u_int'
/usr/include/bits/types.h:36: error: previous definition of '__u_int' 
+was here
/usr/include/sys/types.h:37: error: syntax error before "u_int"
/usr/include/sys/types.h:38: error: storage class specified for parame
+ter `__u_long'
/usr/include/sys/types.h:38: error: conflicting types for '__u_long'
/usr/include/bits/types.h:37: error: previous definition of '__u_long'
+ was here
/usr/include/sys/types.h:38: error: syntax error before "u_long"
/usr/include/sys/types.h:39: error: storage class specified for parame
+ter `__quad_t'
/usr/include/sys/types.h:39: error: redefinition of parameter '__quad_
+t'
/usr/include/bits/types.h:187: error: previous definition of '__quad_t
+' was here/usr/include/sys/types.h:39: error: syntax error before "qu
+ad_t"
/usr/include/sys/types.h:40: error: storage class specified for parame
+ter `__u_quad_t'
/usr/include/sys/types.h:40: error: syntax error before "u_quad_t"
/usr/include/sys/types.h:41: error: storage class specified for parame
+ter `__fsid_t'
/usr/include/sys/types.h:41: error: syntax error before "fsid_t"
/usr/include/sys/types.h:46: error: storage class specified for parame
+ter `__loff_t'
/usr/include/sys/types.h:46: error: syntax error before "loff_t"
/usr/include/sys/types.h:50: error: storage class specified for parame
+ter `__ino_t'
/usr/include/sys/types.h:50: error: syntax error before "ino_t"
/usr/include/sys/types.h:62: error: storage class specified for parame
+ter `__dev_t'
/usr/include/sys/types.h:62: error: syntax error before "dev_t"
/usr/include/sys/types.h:67: error: storage class specified for parame
+ter `__gid_t'
/usr/include/sys/types.h:67: error: syntax error before "gid_t"
/usr/include/sys/types.h:72: error: storage class specified for parame
+ter `__mode_t'
/usr/include/sys/types.h:72: error: syntax error before "mode_t"
/usr/include/sys/types.h:77: error: storage class specified for parame
+ter `__nlink_t'
/usr/include/sys/types.h:77: error: syntax error before "nlink_t"
/usr/include/sys/types.h:82: error: storage class specified for parame
+ter `__uid_t'
/usr/include/sys/types.h:82: error: syntax error before "uid_t"
/usr/include/sys/types.h:88: error: storage class specified for parame
+ter `__off_t'
/usr/include/sys/types.h:88: error: syntax error before "off_t"
/usr/include/sys/types.h:100: error: storage class specified for param
+eter `__pid_t'
/usr/include/sys/types.h:100: error: syntax error before "pid_t"
/usr/include/sys/types.h:105: error: storage class specified for param
+eter `__id_t'
/usr/include/sys/types.h:105: error: syntax error before "id_t"
/usr/include/sys/types.h:110: error: storage class specified for param
+eter `__ssize_t'
/usr/include/sys/types.h:110: error: syntax error before "ssize_t"
/usr/include/sys/types.h:116: error: storage class specified for param
+eter `__daddr_t'
/usr/include/sys/types.h:116: error: syntax error before "daddr_t"
/usr/include/sys/types.h:117: error: storage class specified for param
+eter `__caddr_t'
/usr/include/sys/types.h:117: error: conflicting types for '__caddr_t'
/usr/include/bits/types.h:188: error: previous definition of '__caddr_
+t' was here
/usr/include/sys/types.h:117: error: syntax error before "caddr_t"
/usr/include/sys/types.h:123: error: storage class specified for param
+eter `__key_t'
/usr/include/sys/types.h:123: error: syntax error before "key_t"
In file included from /usr/include/sys/types.h:133,
                 from /usr/local/include/php/Zend/zend_hash.h:25,
                 from /usr/local/include/php/Zend/zend_globals.h:32,
                 from /usr/local/include/php/main/php_main.h:25,
                 from assertlibSu6peu8p.c:1:
/usr/include/time.h:76: error: storage class specified for parameter `
+__time_t'
/usr/include/time.h:76: error: syntax error before "time_t"
/usr/include/time.h:92: error: storage class specified for parameter `
+__clockid_t'
/usr/include/time.h:92: error: syntax error before "clockid_t"
/usr/include/time.h:104: error: storage class specified for parameter 
+`__timer_t'
/usr/include/time.h:104: error: syntax error before "timer_t"
In file included from /usr/local/include/php/Zend/zend_hash.h:25,
                 from /usr/local/include/php/Zend/zend_globals.h:32,
                 from /usr/local/include/php/main/php_main.h:25,
                 from assertlibSu6peu8p.c:1:
/usr/include/sys/types.h:151: error: storage class specified for param
+eter `ulong'
/usr/include/sys/types.h:152: error: storage class specified for param
+eter `ushort'
/usr/include/sys/types.h:153: error: storage class specified for param
+eter `uint'
/usr/include/sys/types.h:191: error: storage class specified for param
+eter `int8_t'
/usr/include/sys/types.h:192: error: storage class specified for param
+eter `int16_t'
/usr/include/sys/types.h:193: error: storage class specified for param
+eter `int32_t'
/usr/include/sys/types.h:194: error: storage class specified for param
+eter `int64_t'
/usr/include/sys/types.h:197: error: storage class specified for param
+eter `u_int8_t'
/usr/include/sys/types.h:198: error: storage class specified for param
+eter `u_int16_t'
/usr/include/sys/types.h:199: error: storage class specified for param
+eter `u_int32_t'
/usr/include/sys/types.h:200: error: storage class specified for param
+eter `u_int64_t'
/usr/include/sys/types.h:202: error: storage class specified for param
+eter `register_t'
In file included from /usr/include/sys/types.h:216,
                 from /usr/local/include/php/Zend/zend_hash.h:25,
                 from /usr/local/include/php/Zend/zend_globals.h:32,
                 from /usr/local/include/php/main/php_main.h:25,
                 from assertlibSu6peu8p.c:1:
/usr/include/sys/select.h:38: error: storage class specified for param
+eter `sigset_t'
In file included from /usr/include/sys/select.h:44,
                 from /usr/include/sys/types.h:216,
                 from /usr/local/include/php/Zend/zend_hash.h:25,
                 from /usr/local/include/php/Zend/zend_globals.h:32,
                 from /usr/local/include/php/main/php_main.h:25,
                 from assertlibSu6peu8p.c:1:
/usr/include/time.h:120: error: syntax error before "__time_t"
/usr/include/time.h:122: error: syntax error before '}' token
In file included from /usr/include/sys/select.h:46,
                 from /usr/include/sys/types.h:216,
                 from /usr/local/include/php/Zend/zend_hash.h:25,
                 from /usr/local/include/php/Zend/zend_globals.h:32,
                 from /usr/local/include/php/main/php_main.h:25,
                 from assertlibSu6peu8p.c:1:
/usr/include/bits/time.h:71: error: syntax error before "__time_t"
In file included from /usr/include/sys/types.h:216,
                 from /usr/local/include/php/Zend/zend_hash.h:25,
                 from /usr/local/include/php/Zend/zend_globals.h:32,
                 from /usr/local/include/php/main/php_main.h:25,
                 from assertlibSu6peu8p.c:1:
/usr/include/sys/select.h:49: error: storage class specified for param
+eter `__suseconds_t'
/usr/include/sys/select.h:49: error: syntax error before "suseconds_t"
/usr/include/sys/select.h:55: error: storage class specified for param
+eter `__fd_mask'
/usr/include/sys/select.h:75: error: syntax error before "__fd_mask"
/usr/include/sys/select.h:85: error: storage class specified for param
+eter `__fd_mask'
/usr/include/sys/select.h:85: error: conflicting types for '__fd_mask'
/usr/include/sys/select.h:55: error: previous definition of '__fd_mask
+' was here/usr/include/sys/select.h:85: error: syntax error before "f
+d_mask"
/usr/include/sys/select.h:109: error: syntax error before "fd_set"
/usr/include/sys/select.h:112: error: storage class specified for para
+meter `select'
In file included from /usr/local/include/php/Zend/zend_hash.h:25,
                 from /usr/local/include/php/Zend/zend_globals.h:32,
                 from /usr/local/include/php/main/php_main.h:25,
                 from assertlibSu6peu8p.c:1:
/usr/include/sys/types.h:235: error: storage class specified for param
+eter `__fsblkcnt_t'
/usr/include/sys/types.h:235: error: syntax error before "fsblkcnt_t"
/usr/include/sys/types.h:239: error: storage class specified for param
+eter `__fsfilcnt_t'
/usr/include/sys/types.h:239: error: syntax error before "fsfilcnt_t"
In file included from /usr/include/sys/types.h:266,
                 from /usr/local/include/php/Zend/zend_hash.h:25,
                 from /usr/local/include/php/Zend/zend_globals.h:32,
                 from /usr/local/include/php/main/php_main.h:25,
                 from assertlibSu6peu8p.c:1:
/usr/include/bits/pthreadtypes.h:35: error: storage class specified fo
+r parameter `_pthread_descr'
/usr/include/bits/pthreadtypes.h:48: error: syntax error before "size_
+t"
/usr/include/bits/pthreadtypes.h:51: error: syntax error before "size_
+t"
/usr/include/bits/pthreadtypes.h:66: error: syntax error before "_pthr
+ead_descr"/usr/include/bits/pthreadtypes.h:68: error: `__pthread_cond
+_align_t' undeclared (first use in this function)
/usr/include/bits/pthreadtypes.h:68: error: (Each undeclared identifie
+r is reported only once
/usr/include/bits/pthreadtypes.h:68: error: for each function it appea
+rs in.)
/usr/include/bits/pthreadtypes.h:68: confused by earlier errors, baili
+ng out
Can't link/include 'php_main.h'

[download]
Is it a bug, or am I missing something?
--
No matter how great and destructive your problems may seem now, remember, you've probably only seen the tip of them. [1]

In Section Seekers of Perl Wisdom