Re: MinGW DLLs and autoconf parsing

[Roumen Petrov]

Jason Curl wrote:
> Hello,
>
> Recently some info was posted about using resource files with Windows 
> compilers. I'm trying to generate a reasonably simple Version resource and 
> there's some information I'm not sure how I can extract from the build process. 
> I'm using libtool-1.5.27a on MSYS-1.0.10 with MinGW-5.1.4.
>
>
> Question 1:
> One of the fields is "OriginalFilename". When the shared DLL is built, it is installed 
> "libfoo-1.dll". I've created a "rsrc.rc.in" file that autoconf generates for me, 
> substituting information from the build process directly into this resource file.
>
> However, how might I get the name of the library before it is built?

You may create library with name "libfoo.dll" if you call make with
LDFLAGS="--avoid-version".
Also you may set this flag in configure script for mingw host.
libtool don't preserve LIBRARY statement specified by def-file.

The string "-1" is suffix appended by libtool for cygwin/mingw host. The
number is equal to  "$current - $age" from version info.


> Question 2:
> The second task is the versioning. There are two fields, both of the format:
> FILEVERSION major,minor,revision,build
>
> I need to substitute them based on the version information given to libtool 
> during the linking phase.
> WINSERLOG_VERSION_INFO="1:0:0"
> AC_SUBST(WINSERLOG_VERSION_INFO)
>
> How can I convert the string "1:0:0" to a major.minor.revision field? How does 
> this work?

awk, sed , shell ?
- born shell sample:
IFS=:; set -- `echo a:b:c`; echo $1.$2.$3


> Question 3:
> As the libtool --tag=RC doesn't work for 1.5.27a (it complained about an 
> unknown tag), I wrote the rule:

I guess that configure script is without macro AC_LIBTOOL_RC


> .rc.lo:
>         $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --tag=CC --mode=compile 
> $(RC) $(RCFLAGS) $< -o $@
>
> where RC=windres and RCFLAGS is empty. It works, but is it safe? I don't know 
> when MinGW will upgrade the autotools.

May be you need two rules : one to create %.lo file and one for object
file (%.o):
-------------------
RCFLAGS = $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS)
RCCOMPILE = $(RC) $(RCFLAGS)
LTRCCOMPILE = $(LIBTOOL) --mode=compile --tag=RC $(RCCOMPILE)

.rc.lo:
        $(LTRCCOMPILE) -i "$<" -o "$@"

.rc.o:
        $(RCCOMPILE) -i "$<" -o "$@"
-------------------


> Thanks & Best Regards,
> Jason.

Roumen