specs file for gcc-2.95.2-7 and -mno-cygwin

[Prof Brian D Ripley <ripley at stats dot ox dot ac dot uk>]

I believe there are several problems in using gcc-2.95.2-7.tar.gz with
mingw-20010130-1.tar.gz (the latest on the mirror I use), and I will append
a patch to the specs file which addresses these.

1) mingw-20010130-1.tar.gz unpacks into /usr/include/mingw32, but the
   specs file has `mingw' in several places.  I've assumed the specs file
   is the wrong one here.

2) The mingw(32) files are selected by -idirafter, and so come after
   those in /usr/lib/gcc-lib/i686-pc-cygwin/2.95.2-7/include in the
   system include path.  This is wrong at least in the case of
   float.h, where the mingw version must take precedence.  Maybe
   -isystem /usr/local/include/mingw was just a mistake.

3) The -mno-cygwin build is now targeted at msvcrt.dll (good).
   However, the mingw header files default to target crtdll.dll
   unless __MSVCRT__ is set, and it has not been.

4) `*mingw_include_path: i686-pc-cygwin'  seems out of date : the
   mingw include files are no longer installed there.

5) I rather suspect from the header files that __MINGW32__ should be
   0.3 not 0.2.


I usually use the real mingw compilers to compile the GNU R project
(http://www.r-project.org) but a user complained that it no longer
compiled under cygwin, which led me to investigate this.

I have not attempted to sort out the g++ header file paths, as
without a mingw version of libstdc++ (AFAICS) there is little
mileage in compiling C++ under -mno-cygwin, and I don't have need of it.


diff -u follows:
--- specs.orig	Tue Jan 30 21:38:32 2001
+++ specs	Sat Feb  3 18:22:32 2001
@@ -5,7 +5,7 @@


 *cpp:
--remap %(cpp_cpu) %{posix:-D_POSIX_SOURCE}   %{!mno-cygwin:-D__CYGWIN32__ -D__CYGWIN__ -Dunix -D__unix__ -D__unix     -isystem /usr/local/include     -idirafter /usr/include}   %{mno-win32: %{mno-cygwin: %emno-cygwin and mno-win32 are not compatible}}   %{mno-cygwin:-DWIN32 -D__WIN32__ -D__MINGW32__=0.2     %{mthreads:-D_MT}     -isystem /usr/local/include/mingw     -idirafter /usr/include/mingw     -iwithprefixbefore ../../../../mingw/include/g++-3     -iwithprefixbefore ../../../../mingw/include     -iwithprefixbefore ../../../../mingw32/include/g++-3     -iwithprefixbefore ../../../../mingw32/include }    %{mwin32:-DWIN32 -D_WIN32 -D__WIN32 -D__WIN32__ -DWINNT      -idirafter /usr/include/w32api}
+-remap %(cpp_cpu) %{posix:-D_POSIX_SOURCE}   %{!mno-cygwin:-D__CYGWIN32__ -D__CYGWIN__ -Dunix -D__unix__ -D__unix     -isystem /usr/local/include     -idirafter /usr/include}   %{mno-win32: %{mno-cygwin: %emno-cygwin and mno-win32 are not compatible}}   %{mno-cygwin:-DWIN32 -D__WIN32__ -D__MINGW32__=0.3  -D__MSVCRT__   %{mthreads:-D_MT}     -isystem /usr/include/mingw32     -idirafter /usr/include/mingw32     -iwithprefixbefore ../../../../mingw32/include/g++-3     -iwithprefixbefore ../../../../mingw32/include     -iwithprefixbefore ../../../../mingw32/include/g++-3     -iwithprefixbefore ../../../../mingw32/include }    %{mwin32:-DWIN32 -D_WIN32 -D__WIN32 -D__WIN32__ -DWINNT      -idirafter /usr/include/w32api}

 *cc1:
 %(cc1_spec)
@@ -80,7 +80,7 @@
 %{!mcpu*: %{m386:-mcpu=i386 -march=i386} %{m486:-mcpu=i486 -march=i486} %{mpentium:-mcpu=pentium} %{mpentiumpro:-mcpu=pentiumpro}}

 *mingw_include_path:
-i686-pc-cygwin
+

 *link_command:
 %{!fsyntax-only:  %{!c:%{!M:%{!MM:%{!E:%{!S:%(linker) %l %X %{o*} %{A} %{d} %{e*} %{m} %{N} %{n} 			%{r} %{s} %{t} %{u*} %{x} %{z} %{Z}			%{!A:%{!nostdlib:%{!nostartfiles:%S}}}			%{static:} %{L*} %D %o			%{!nostdlib:%{!nodefaultlibs:%G %L %G}}			%{!A:%{!nostdlib:%{!nostartfiles:%E}}}			%{T*}


-- 
Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595


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