Bug #69729 [Opn]: unresolved externals when compiling with VC 2015

Edit report at https://bugs.php.net/bug.php?id=69729&edit=1 ID: 69729 User updated by: phpdev at ehrhardt dot nl Reported by: phpdev at ehrhardt dot nl Summary: unresolved externals when compiling with VC 2015 Status: Open Type: Bug Package: Compile Failure Operating System: Windows with VC14 PHP Version: master-Git-2015-05-29 (Git) Block user comment: N Private report: N New Comment: Current compilations: https://phpdev.toolsforresearch.com/php-7.0.0-dev-nts-Win32-VC14-x86.htm https://phpdev.toolsforresearch.com/php-7.0.0-dev-nts-Win32-VC14-x86.zip https://phpdev.toolsforresearch.com/php-7.0.0-dev-Win32-VC14-x86.htm https://phpdev.toolsforresearch.com/php-7.0.0-dev-Win32-VC14-x86.zip Previous Comments: ------------------------------------------------------------------------ [2015-05-29 09:20:04] phpdev at ehrhardt dot nl Description: ------------ I am getting lots of unresolved externals when I try to compile PHP7 with VC14 (VC 2015). I started with a clean sheet and VC 2015 Pro RC. I used the deps from http://windows.php.net/downloads/php-sdk/deps-5.6-vc11-x86.7z as starting point. With those deps a lot of extensions did not compile. I recompiled mcrypt, iconv, xml2, ssleay32, libeay32, ssh2, curl, xpm, zlib, jpeg, png, vpx, libbz2, netsnmp (all x86 vc14) to get rid of many problems. But I was really surprised recompilation if the libs was needed. Some still remain, like php_gmp.dll, which fails on the mpir_a.lib in the VC11 deps for 5.6. Error messages below. Test script: --------------- Recreating build dirs Recreating build dirs Recreating build dirs libiconv_a.lib(iconv1.obj) : MSIL .netmodule or module compiled with /GL found; restarting link with /LTCG; add /LTCG to the link command line to improve linker performance Creating library C:\php-sdk\php70dev\Release_TS\php7ts.lib and object C:\php-sdk\php70dev\Release_TS\php7ts.exp Generating code Finished generating code Creating library C:\php-sdk\php70dev\Release_TS\php_gmp.lib and object C:\php-sdk\php70dev\Release_TS\php_gmp.exp LINK : warning LNK4098: defaultlib 'LIBCMT' conflicts with use of other libs; use /NODEFAULTLIB:library mpir_a.lib(memory.obj) : error LNK2019: unresolved external symbol ___iob_func referenced in function ___gmp_default_allocate mpir_a.lib(assert.obj) : error LNK2001: unresolved external symbol ___iob_func C:\php-sdk\php70dev\Release_TS\php_gmp.dll : fatal error LNK1120: 1 unresolved externals Expected result: ---------------- I expected that VC14 would build with the deps that work fine for VC11 and VC12 Actual result: -------------- Broken compilation for lots of extensions (and even the core before I recompiled some libs). ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=69729&edit=1