[AD] Error compiling MinGW Allegro with Cygwin with w32api-3.8-1

[Andrei Ellman <ae-a-alleg@xxxxxxxxxx>]

Hi,

I've discovered an issue when compiling MinGW Allegro 4.2.1 with Cygwin 
with w32api-3.8-1 . If I downgrade to the w32api-3.7-1 package, the 
error goes away. Note that in both cases, I installed dx80_mgw.zip after 
I had installed the Cygwin package.

Here's the output for the offending compilation (note: All files up 
until that point compiled just fine):

gcc -DALLEGRO_SRC -DALLEGRO_LIB_BUILD -Wall -Wno-unused -mtune=i586 -O2 
-funroll
-loops -ffast-math -mno-cygwin -fomit-frame-pointer -I. -I./include -o 
obj/mingw
32/alleg/wdsinput.o -c src/win/wdsinput.c
In file included from src/win/wdsinput.c:33:
/usr/lib/gcc/i686-pc-mingw32/3.4.4/../../../../include/w32api/mmsystem.h:1570: 
e
rror: parse error before "LPCWAVEFORMATEX"
/usr/lib/gcc/i686-pc-mingw32/3.4.4/../../../../include/w32api/mmsystem.h:1591: 
e
rror: parse error before "LPCWAVEFORMATEX"
In file included from src/win/wdsinput.c:34:
/usr/lib/gcc/i686-pc-mingw32/3.4.4/../../../../include/w32api/dsound.h:350: 
erro
r: parse error before "LPWAVEFORMATEX"
/usr/lib/gcc/i686-pc-mingw32/3.4.4/../../../../include/w32api/dsound.h:356: 
erro
r: parse error before '*' token
/usr/lib/gcc/i686-pc-mingw32/3.4.4/../../../../include/w32api/dsound.h:366: 
erro
r: parse error before "LPWAVEFORMATEX"
/usr/lib/gcc/i686-pc-mingw32/3.4.4/../../../../include/w32api/dsound.h:369: 
erro
r: parse error before '*' token
/usr/lib/gcc/i686-pc-mingw32/3.4.4/../../../../include/w32api/dsound.h:417: 
erro
r: parse error before "LPWAVEFORMATEX"
/usr/lib/gcc/i686-pc-mingw32/3.4.4/../../../../include/w32api/dsound.h:426: 
erro
r: parse error before "LPWAVEFORMATEX"
/usr/lib/gcc/i686-pc-mingw32/3.4.4/../../../../include/w32api/dsound.h:433: 
erro
r: parse error before '*' token
/usr/lib/gcc/i686-pc-mingw32/3.4.4/../../../../include/w32api/dsound.h:582: 
erro
r: parse error before "LPCDSBUFFERDESC"
/usr/lib/gcc/i686-pc-mingw32/3.4.4/../../../../include/w32api/dsound.h:687: 
erro
r: parse error before "LPWAVEFORMATEX"
/usr/lib/gcc/i686-pc-mingw32/3.4.4/../../../../include/w32api/dsound.h:692: 
erro
r: parse error before "LPCDSBUFFERDESC"
/usr/lib/gcc/i686-pc-mingw32/3.4.4/../../../../include/w32api/dsound.h:697: 
erro
r: parse error before "LPCWAVEFORMATEX"
/usr/lib/gcc/i686-pc-mingw32/3.4.4/../../../../include/w32api/dsound.h:1004: 
err
or: parse error before "LPCDSCBUFFERDESC"
/usr/lib/gcc/i686-pc-mingw32/3.4.4/../../../../include/w32api/dsound.h:1042: 
err
or: parse error before "LPWAVEFORMATEX"
/usr/lib/gcc/i686-pc-mingw32/3.4.4/../../../../include/w32api/dsound.h:1044: 
err
or: parse error before "LPCDSCBUFFERDESC"
src/win/wdsinput.c:54: error: parse error before "dsc_buf_wfx"
src/win/wdsinput.c:54: warning: type defaults to `int' in declaration of 
`dsc_bu
f_wfx'
src/win/wdsinput.c:54: warning: data definition has no type or storage class
src/win/wdsinput.c:120: error: parse error before '*' token
src/win/wdsinput.c: In function `create_test_capture_buffer':
src/win/wdsinput.c:123: error: parse error before "dsc_trybuf_desc"
src/win/wdsinput.c:127: error: `dsc_trybuf_desc' undeclared (first use 
in this f
unction)
src/win/wdsinput.c:127: error: (Each undeclared identifier is reported 
only once

src/win/wdsinput.c:127: error: for each function it appears in.)
src/win/wdsinput.c:132: error: `wfx' undeclared (first use in this function)
src/win/wdsinput.c: At top level:
src/win/wdsinput.c:150: error: parse error before "WAVEFORMATEX"
src/win/wdsinput.c: In function `get_capture_format_support':
src/win/wdsinput.c:155: error: `WAVEFORMATEX' undeclared (first use in 
this func
tion)
src/win/wdsinput.c:155: error: `test_wfx' undeclared (first use in this 
function
)
src/win/wdsinput.c:190: error: `autodetect' undeclared (first use in 
this functi
on)
src/win/wdsinput.c:194: error: `bits' undeclared (first use in this 
function)
src/win/wdsinput.c:194: error: request for member `wBitsPerSample' in 
something
not a structure or union
src/win/wdsinput.c:195: error: `stereo' undeclared (first use in this 
function)
src/win/wdsinput.c:195: error: request for member `nChannels' in 
something not a
structure or union
src/win/wdsinput.c:196: error: request for member `nChannels' in 
something not a
structure or union
src/win/wdsinput.c:197: error: `rate' undeclared (first use in this 
function)
src/win/wdsinput.c:197: error: request for member `nSamplesPerSec' in 
something
not a structure or union
src/win/wdsinput.c:202: error: `wfx' undeclared (first use in this function)
src/win/wdsinput.c: In function `digi_directsound_capture_init':
src/win/wdsinput.c:269: error: `WAVEFORMATEX' undeclared (first use in 
this func
tion)
src/win/wdsinput.c:269: error: parse error before "wfx"
src/win/wdsinput.c:311: error: `wfx' undeclared (first use in this function)
src/win/wdsinput.c: In function `digi_directsound_rec_cap_rate':
src/win/wdsinput.c:401: error: `WAVEFORMATEX' undeclared (first use in 
this func
tion)
src/win/wdsinput.c:401: error: parse error before "wfx"
src/win/wdsinput.c:403: error: `wfx' undeclared (first use in this function)
src/win/wdsinput.c: In function `digi_directsound_rec_start':
src/win/wdsinput.c:452: error: parse error before "dscBufDesc"
src/win/wdsinput.c:465: error: request for member `wBitsPerSample' in 
something
not a structure or union
src/win/wdsinput.c:466: error: request for member `nChannels' in 
something not a
structure or union
src/win/wdsinput.c:469: error: `dscBufDesc' undeclared (first use in 
this functi
on)
src/win/wdsinput.c:472: error: request for member `nAvgBytesPerSec' in 
something
not a structure or union
make: *** [obj/mingw32/alleg/wdsinput.o] Error 1


I get the impression that mmsystem.h is the culprit. I did a diff 
between the one from the 3.7.1 and 3.8.1 files, and this is what it came 
up with:

194a194
> #define WAVE_FORMAT_EXTENSIBLE 0xFFFE
1012c1013,1014
< #ifndef _WAVEFORMATEX_
---
> #ifndef _LPCWAVEFORMATEX_DEFINED
> #define _LPCWAVEFORMATEX_DEFINED


The changelog is at 
http://cygwin.com/ml/cygwin-announce/2006-11/msg00039.html
I believe the relevant entry to be:

* include/mmsystem.h (_LPCWAVEFORMATEX_DEFINED): Define.
   Use as guard for the WAVEFORMATEX structure instead of
   _WAVEFORMATEX_ to avoid clashes with DirectSound. Keep
   _WAVEFORMATEX_ for compatibility.


I'm not sure if this is a Cygwin or an Allegro related problem.


gcc -v produces the following:
Reading specs from /usr/lib/gcc/i686-pc-cygwin/3.4.4/specs
Configured with: /gcc/gcc-3.4.4/gcc-3.4.4-1/configure --verbose 
--prefix=/usr --
exec-prefix=/usr --sysconfdir=/etc --libdir=/usr/lib 
--libexecdir=/usr/lib --man
dir=/usr/share/man --infodir=/usr/share/info 
--enable-languages=c,ada,c++,d,f77,
java,objc --enable-nls --without-included-gettext 
--enable-version-specific-runt
ime-libs --without-x --enable-libgcj --disable-java-awt 
--with-system-zlib --ena
ble-interpreter --disable-libgcj-debug --enable-threads=posix 
--enable-java-gc=b
oehm --disable-win32-registry --enable-sjlj-exceptions 
--enable-hash-synchroniza
tion --enable-libstdcxx-debug : (reconfigured)
Thread model: posix
gcc version 3.4.4 (cygming special) (gdc 0.12, using dmd 0.125)


AE.