Hi,
I'm new to mingw-w64. Thanks for creating such a useful cross platform
project!
I am having a problem I'm hopeful someone can help me with. The problem is
I can build and run my application on linux (i386-linux) and 64bit windows
(x86_64-win64), but it fails to link properly when I target 32bit windows
(i386-win32). The errors I am getting when I link for i386-win32 are:
Error: Undefined symbol: __time32
Undefined symbol: __localtime32
Undefined symbol: __gmtime32
There were 3 errors compiling module, stopping
I do not get these error when targeting x86_64-win64 and my test app run
perfectly on 64bit windows.
What I'm doing is writing a set of cross platform applications (mac,
windows, linux) and I am attempting to build everything using one
environment (Ubuntu 12.04 32bit). The project I'm writing is a mix of c,
c++, and free pascal. I am building some parts using static libraries like
openssl.
Here is a snippet of my source code (WARNING PASCAL FOLLOWS):
// Unit to link a static openssl library to my pascal applications
// With this unit I can build a single exe with no external dependencies
unit CryptoLib;
{$i cross.inc}
interface
const
SSL_ERROR_NONE = 0;
// snip ...
{ SSL routines }
function SSL_library_init: Integer; cdecl; external;
// snip ...
{ Hashing routines }
function MD5_Init(out context: TMD5Ctx): LongBool; cdecl; external;
// snip ...
// if were using window i pull in ming-w64 libraries
{$ifdef windows}
// pulled in from x86_64-w64-mingw32/lib or i686-w64-mingw32/lib
// as determined by project target cpu
// these libs satisfy the compiler
{$linklib msvcrt}
{$linklib user32}
{$linklib kernel32}
{$linklib ws2_32}
{$linklib advapi32}
{$linklib gdi32}
// libgcc.a is placed in project i386-win32 and x86_64-win64 folders, i
copy it from
// /usr/lib/gcc/i686-w64-mingw32/4.6
and /usr/lib/gcc/x86_64-w64-mingw32/4.6 respectively
// it needs to be here needed to resolve symbol "___chkstk_ms"
{$linklib gcc}
// The problem ... on i386-win32 these symbols are not resolved
// Error: Undefined symbol: __time32
// Undefined symbol: __localtime32
// Undefined symbol: __gmtime32
// There were 3 errors compiling module, stopping
//
// *BUT*
//
// When I switch to x86_64-win64 everything works fine
// and the test application run perfectly on 64bit windows
{$endif}
// project options set link
// i386-linux version build using make
// i686-ming-w64 and x86_64-ming-w64 build using make configure script
// openssl static libraries. path is set by target information
// $(ProjectDir)/i386-linux, i386-win32, or x86_64-win64
{$linklib libssl.a}
{$linklib libcrypto.a}
implementation
end.
In summary here is what I've done:
I installed mingw-w64
I built versions of openssl using both x86_64-w64-mingw32 and
i686-w64-mingw32 successfully.
I copied the resulting libssl.a and libcrypto.a static libraries to my
project lib/i386-win32 and lib/x86_64-win64 folders.
I setup my environment to refer to /usr/x86_64-w64-mingw32/lib
or /usr/i686-w64-mingw32/lib in order to satisy msvcrt, user32 ect
I had to copy libgcc.a from /usr/lib/gcc/x86_64-w64-mingw32/4.6
and /usr/lib/gcc/i686-w64-mingw32/4.6
libgcc.a contains "___chkstk_ms" which needs to be resolved.
i place a copy of the file in my project lib/i386-win32
and lib/x86_64-win64 folders.
On linux I build for i386-linux and it succeeds. The test application on
linux returns the expected results from openssl functions.
On linux I build for x86_64-win64 and it succeeds. The test application is
copied to my 64bit windows box and returns the expected results from
openssl functions.
On linux I build for i386-win32 and it the linker fails when it cannot
locale __time32, __localtime32, and __gmtime32.
I have tried searching for:
find . -name "*.a" -exec i686-w64-mingw32-nm -o {} \; | grep -i time32
And I cannot find the functions.
I am at my wits end here. I could really use some help in finding why my
pascal compiler needs __time32 when using a static lib built
from i686-ming-w64
Thanks
Anthony Walter
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