Have you looked at the README.solaris file (I assume 5.14 has one just like 5.10.1 did)? And I assume you are using /usr/sfw/bin/gcc?

Using tcsh, this is the environment I setup before building Perl 5.10.1 a couple years ago. Maybe it will help you. For bash, use export VAR="VALUE" instead. 

setenv PATH /usr/sbin:/sbin:/usr/bin:/usr/sfw/bin:/usr/sfw/libexec:/us
+r/ccs/bin:.
setenv LD_LIBRARY_PATH /usr/lib:/usr/sfw/lib:/usr/local/ssl/lib
setenv LD_LIBRARY_PATH_64 /usr/lib/sparcv9:/usr/sfw/lib/sparcv9
setenv MANPATH /usr/share/man:/usr/sfw/man
unalias *

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And below is my myconfig file (again, from Perl 5.10.1). I would suggest you compare your 5.12 and my 5.10.1 stuff with your 5.14 stuff to see what's different. 
#!/bin/sh

# This script is designed to provide a handy summary of the configurat
+ion
# information being used to build perl. This is especially useful if y
+ou
# are requesting help from comp.lang.perl.misc on usenet or via mail.

# Note that the text lines /^Summary of/ .. /^\s*$/ are copied into Co
+nfig.pm.
cat <<'!NO!SUBS!'
Summary of my perl5 (revision 5 version 10 subversion 1) configuration
+:

  Platform:
    osname=solaris, osvers=2.10, archname=sun4-solaris-thread-multi
    uname='sunos searay 5.10 generic_137111-06 sun4u sparc sunw,sun-fi
+re-880 '
    config_args=''
    hint=recommended, useposix=true, d_sigaction=define
    useithreads=define, usemultiplicity=define
    useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=und
+ef
    use64bitint=undef, use64bitall=undef, uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='gcc', ccflags ='-D_REENTRANT -fno-strict-aliasing -pipe -I/usr
+/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -DPERL_USE_
+SAFE_PUTENV',
    optimize='-O',
    cppflags='-D_REENTRANT -fno-strict-aliasing -pipe -I/usr/local/inc
+lude'
    ccversion='', gccversion='3.4.3 (csl-sol210-3_4-branch+sol_rpath)'
+, gccosandvers='solaris2.10'
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=4321
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=1
+6
    ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t',
+ lseeksize=8
    alignbytes=8, prototype=define
  Linker and Libraries:
    ld='gcc', ldflags ='-L/usr/lib/sparcv9 -L/usr/sfw/lib/sparcv9 -L/u
+sr/lib -L/usr/sfw/lib -L/usr/local/ssl/lib '
    libpth=/usr/lib/sparcv9 /usr/sfw/lib/sparcv9 /usr/lib /usr/sfw/lib
+ /usr/local/ssl/lib
    libs=-lsocket -lnsl -lgdbm -ldl -lm -lpthread -lc
    perllibs=-lsocket -lnsl -ldl -lm -lpthread -lc
    libc=/lib/libc.so, so=so, useshrplib=false, libperl=libperl.a
    gnulibc_version=''
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags=' '
    cccdlflags='-fPIC', lddlflags='-G -L/usr/lib/sparcv9 -L/usr/sfw/li
+b/sparcv9 -L/usr/lib -L/usr/sfw/lib -L/usr/local/ssl/lib'

!NO!SUBS!

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In reply to Re: threads.xs compile error by Argel
in thread threads.xs compile error by Anonymous Monk

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