Topic: mod_perl problem

[roblassche]

I use MinGW, Visual C 10 express and MS SDK.
I compiled Perl and Apache (with apr) from source, it works.
The binary mod_perl, downloaded from apachelounge works with MY compiled version of Perl and Apache.

I also want to compile mod_perl from sources, but fails.
This is the error during linking:
icrosoft (R) Program Maintenance Utility Version 10.00.30319.01
Copyright (C) Microsoft Corporation. All rights reserved.

mod_perl.lo:mod_perl.c:(.text+0x1a): undefined reference to `_imp__apr_dynamic_fn_register'
mod_perl.lo:mod_perl.c:(.text+0x32): undefined reference to `_imp__ap_server_config_defines'
mod_perl.lo:mod_perl.c:(.text+0x3d): undefined reference to `_imp__apr_array_push@4'
mod_perl.lo:mod_perl.c:(.text+0x51): undefined reference to `_imp__apr_pstrdup@8'
mod_perl.lo:mod_perl.c:(.text+0x7b): undefined reference to `_imp__ap_hook_pre_config@16'
mod_perl.lo:mod_perl.c:(.text+0xa3): undefined reference to `_imp__ap_hook_open_logs@16'
mod_perl.lo:mod_perl.c:(.text+0xcb): undefined reference to `_imp__ap_hook_post_config@16'
mod_perl.lo:mod_perl.c:(.text+0xf3): undefined reference to `_imp__ap_hook_handler@16'
mod_perl.lo:mod_perl.c:(.text+0x141): undefined reference to `_imp__ap_hook_insert_filter@16'
mod_perl.lo:mod_perl.c:(.text+0x18f): undefined reference to `_imp__ap_register_output_filter@16'
mod_perl.lo:mod_perl.c:(.text+0x1b9): undefined reference to `_imp__ap_register_input_filter@16'
mod_perl.lo:mod_perl.c:(.text+0x22b): undefined reference to `_imp__ap_hook_pre_connection@16'
mod_perl.lo:mod_perl.c:(.text+0x253): undefined reference to `_imp__ap_hook_create_request@16'
mod_perl.lo:mod_perl.c:(.text+0x27b): undefined reference to `_imp__ap_hook_post_read_request@16'
mod_perl.lo:mod_perl.c:(.text+0x2a3): undefined reference to `_imp__ap_hook_header_parser@16'
mod_perl.lo:mod_perl.c:(.text+0x2cb): undefined reference to `_imp__ap_hook_child_init@16'
mod_perl.lo:mod_perl.c:(.text+0x2ed): undefined reference to `_imp__apr_pool_cleanup_null'
mod_perl.lo:mod_perl.c:(.text+0x30a): undefined reference to `_imp__apr_pool_cleanup_register@16'
mod_perl.lo:mod_perl.c:(.text+0x36c): undefined reference to `_imp__apr_pool_clear@4'
mod_perl.lo:mod_perl.c:(.text+0x679): undefined reference to `_imp__ap_add_version_component@8'
mod_perl.lo:mod_perl.c:(.text+0x914): undefined reference to `_imp__ap_server_root'
mod_perl.lo:mod_perl.c:(.text+0x96f): undefined reference to `_imp__apr_filepath_merge@20'
mod_perl.lo:mod_perl.c:(.text+0x9bd): undefined reference to `_imp__apr_stat@16'
mod_perl.lo:mod_perl.c:(.text+0xc5d): undefined reference to `_imp__apr_pool_create_ex@16'
mod_perl.lo:mod_perl.c:(.text+0xc78): undefined reference to `_imp__apr_pool_tag@8'
mod_perl.lo:mod_perl.c:(.text+0xcf6): undefined reference to `_imp__apr_pool_cleanup_null'
mod_perl.lo:mod_perl.c:(.text+0xd18): undefined reference to `_imp__apr_pool_cleanup_register@16'
mod_perl.lo:mod_perl.c:(.text+0xd56): undefined reference to `_imp__ap_mpm_query@8'
mod_perl.lo:mod_perl.c:(.text+0xe5f): undefined reference to `_imp__apr_palloc@8'
c:/mingw/bin/../lib/gcc/mingw32/4.7.2/../../../../mingw32/bin/ld.exe: mod_perl.lo: bad reloc address 0xc in section `.data'
collect2.exe: fout: ld gaf exit-status 1 terug
dmake: Error code 129, while making 'mod_perl.so'
NMAKE : fatal error U1077: 'cd' : return code '0xff'
Stop.

I grepped for some of the undefined reference and only found something in the .h file:
./httpd-2.2.24/srclib/apr/include/apr_file_info.h
/** Cause apr_filepath_merge to fail if addpath is above rootpath
/** Cause apr_filepath_merge to fail if addpath is above rootpath,
/** Fail apr_filepath_merge if the merged path is relative */
/** Fail apr_filepath_merge if the merged path is absolute */
APR_DECLARE(apr_status_t) apr_filepath_merge(char **newpath,
./httpd-2.2.24/srclib/apr/include/arch/win32/apr_arch_file_io.h
* apr_filepath_root or apr_filepath_merge, this fn determines
/* The apr_filepath_merge wants to canonicalize the cwd to the

***
Do you have a clue what is wrong?

[roblassche]

I solved the LINK errors.
Perl was compiled with MinGW and Apache with MS VC10.
I could NOT find in the sources something with _imp__.
I think this is caused by the MinGW compiler.
Anyway, I compiled Perl with MS VC10 and then compile mod_perl from source. The link errors are GONE and mod_perl.so is created.

I will test mod_perl later on, and document the steps involved in compiling and linking.

[glsmith]

_imp__ means imported function ... verses an exported function. The actual function name is what is after the _imp__.

_imp__apr_dynamic_fn_register

[neoanantha]

[tangent]

I have spent several hours looking into this issue on my build platform with no success, ending up with similar error messages to those already reported above, relating to missing import library references.

However, what I have noticed is differing number of underscores around the import references, depending on whether the build is 32 or 64 bits.

The above post concludes:

[neoanantha]

Appreciate in-depth hands-on analysis @tangent

I took time to respond here since I had used

Strawberry Perl 5.32.1.1 (32bit) portable binary - which is compiled with GCC as already mentioned
Apache 2.4.58 compiled 32bit based on legendary thread 8609 using latest MSVC 2022 Community edition v143 build tools
Mod_perl 2.0.13 was again being attempted through same MSVC settings - 32bit

Combined with your analysis and above combination it was invariably bound to fail due to compiler mismatch between strawberry perl and Apache/mod_perl

Hence went back to do everything from scratch eventhough I wanted 32bit... thought let me align everything to 64bit with full control on Perl as well

This time went with this stack:

Perl 5.40.0 - compile from source - 64bit - msvc v143
Apache24 2.4.58 - compile from source - 64bit - msvc v143 - refer thread 8609
mod_perl 2.0.13 - compile from source - 64bit - msvc v143

With above stack and x64 arch all of them were happy and each one of them got compiled and installed successfully
With Perl and Apache built on x64 using msvc... mod_perl was also happy and got built without any complaints

Will try to tweak/fix my ancient app to align to x64 arch wherever necessary

Thought let me add this here for continuity as inadvertently this issue will surely be encountered my any other person whose taken above path

Finally for those who might face issue with XML::Parser later with with cpan or cpanm install