#!/bin/bash -x
###
##  [snip] a bunch of information concerning mingw prereqs and system
##         setup; default cygwin should be okay as long as the following
##         are installed:
##     libiconv, gettext, zlib, flex, bison, autoconf25, autoconf21,
##     automake19, automake18, automake17, libtool, gcc-3.4.x, gmp, 
##     mpfr
##
##  [M] means mingw-specific
## 
##  GCC CONFIGURE:
##  
##     NOTES:
## [M]   (1) must use relative path to configure (PR24382)
## [M]   (2) must specify --with-as=/path/to/as.exe and --with-ld=/path/to/ld.exe (PR24382)
## [M]   (3) if --prefix is not /mingw, then you need to extract w32api and mingw-runtime
##           packages into the prefix tree.
##       (4) --disable-werror is required on mingw due to PR25502
##       (5) Java screwed up
##          (a) libjava must be compiled with -fno-omit-frame-pointer ; unfortunately,
##              passing the variables in to configure (c.f. BOOT_CFLAGS) does not propagate 
##              them to the libjava configury.  So, we have to put them in the environment 
##              instead -- and that includes plain old "LDFLAGS" because libjava has no 
##              GCJ-specific LD var AND doesn't get its value passed in.
##              The patch to libjava/configure.host MAY fix this problem without requiring
##              the environment variables to be set -- but we ALSO need them set so that
##              libiconv and libintl are found!
##              *** BUT --- even that won't work, because libjava is "horribly broken" on mingw.
##              so, we do not build the java frontend.
##          (b) libjava with SJLJ requires this patch http://gcc.gnu.org/ml/java/2006-04/msg00025.html
##              but given #5 it's a moot point.
##          (c) Even so, get a wierd error building libjava classpath: 
##                ../../../../../gcc-4.1.0-svn/libjava/classpath/gnu/CORBA/DynAn/AbstractAny.java:0: 
##                fatal error: can't open /usr/local/src/gcc/gcc-4.1.0-svn/libjava/gnu/CORBA/DynAn/gnuDynValue.java:
##                No such file or directory
##              when the file in question DOES in fact exist. (c.f. http://gcc.gnu.org/ml/java/2006-03/msg00043.html)
##              There are also oddities in the .deps files in that they include relative paths with backslashes, 
##              which *does not work* with msys's path conversion stuff:
##                  C:\foo\bar is okay. /foo/bar or ../../foo/bar is okay.
##                  NONE OF ..\..\foo\bar nor foo\bar nor \foo\bar work.
##              But again, given 5a...it's moot.
##          (d) see http://tjlaurenzo.blogspot.com/2005/08/building-libgcjdll-for-mingw-with-gcc.html
##                  http://rmathew.com/articles/gcj/bldgcj.html
##                    + http://gcc.gnu.org/ml/java/2006-04/msg00057.html
##                  http://gcc.gnu.org/ml/java/2006-02/msg00047.html && thread
##                  http://gcc.gnu.org/ml/java/2006-04/msg00025.html && thread
##                 
##       (6) both java and ada would probably work better with DWARF2 instead of SJLJ (except gcj 
##           needs a little more work to properly support DWARF2/mingw).  C++ would be 
##           a lot faster with DWARF2.  But then you can't catch exceptions thrown by your
##           methods when they are passed as callbacks to Win32API functions -- a very common
##           paradigm in win32 GUI programming.
##
## set up some environment variables.  CPPFLAGS must be
## handled special, because it is not passed down to subconfigures

export PATH=.:/usr/local/bin:/gnuwin32/bin:/mingw/bin:/bin:/c/WINDOWS/system32:/c/WINDOWS:/c/WINDOWS/System32/Wbem:/c/Util/python24:/c/Util/Subversion/bin
export IP="-I/usr/local/include"
export LP="-L/usr/local/lib"
export CPPFLAGS="${IP}"
## export LIBGCJ_CFLAGS="-ffloat-store -fno-omit-frame-pointer ${IP}"
## export LIBGCJ_CXXFLAGS="-ffloat-store -fno-omit-frame-pointer ${IP}"
## export LIBGCJ_JAVAFLAGS="-ffloat-store -fno-omit-frame-pointer ${IP}"
## export GCJFLAGS="-g -O2 -fno-omit-frame-pointer ${IP}"
## export LDFLAGS="${LP}"


srcdir=../gcc-4.1.0-svn
srcdir_abs=$(cd ${srcdir} ; pwd)
instdir=/usr/local/src/gcc/gcc-4.1.0-inst-release
builddir=/usr/local/src/gcc/gcc-4.1.0-build-release
buildlog=/usr/local/src/gcc/gcc-4.1.0-make-bootstrap.log
instlog=/usr/local/src/gcc/gcc-4.1.0-make-install.log 


#   CFLAGS="-O2 -g ${IP}"      CXXFLAGS="-O2 -g ${IP}"      LDFLAGS="${LP}" \
#   BOOT_CFLAGS="-O2 -g ${IP}" BOOT_CXXFLAGS="-O2 -g ${IP}" BOOT_LDFLAGS="${LP}" \
#   /bin/sh ${srcdir}/configure \
#      --with-gcc --with-gnu-ld --with-gnu-as \
#      --with-as=/mingw/bin/as.exe --with-ld=/mingw/bin/ld.exe \
#      --with-gmp=/usr/local --with-mpfr=/usr/local \
#      --without-included-gettext --with-libintl-prefix=/usr/local --enable-nls \
#      --with-libiconv-prefix=/usr/local \
#      --host=mingw32 --target=mingw32 --prefix=/mingw \
#      --enable-threads --enable-languages=c,c++,fortran \
#      --enable-version-specific-runtime-libs \
#      --disable-win32-registry --disable-shared --enable-sjlj-exceptions \
#      --enable-libgcj --disable-java-awt --without-x --enable-java-gc=boehm \
#      --disable-libgcj-debug --enable-interpreter --enable-hash-synchronization \
#      --enable-libstdcxx-debug \
#      --enable-bootstrap --disable-werror
#
#
#make bootstrap | tee ${buildlog} 2>&1

##
##  OR (takes longer but get a faster compiler)
##  EXCEPT that it is currently (4.1.0) broken on mingw
##  http://spaces.msn.com/yaekees/blog/cns!1955EE8C6707277A!174.entry?_c11_blogpart_blogpart=blogview&_c=blogpart#permalink
##
# make profiledbootstrap

## need the following to avoid a bug in make install
# make stage3-start

# make install DESTDIR=${instdir} | tee ${instlog} 2>&1

pushd ${instdir}/mingw/lib/gcc/mingw32/4.1.0
dlltool --output-def libstdc++.def --export-all libstdc++.a
dlltool --output-def libsupc++.def --export-all libsupc++.a
dlltool --output-def libgcc.def --export-all libgcc.a
cd debug
dlltool --output-def libstdc++.def --export-all libstdc++.a
cd ..

LIBVER=$(grep libtool_VERSION= ${srcdir}/libstdc++-v3/configure | sed -e 's/libtool_VERSION=//')
LIBVER_c=$(echo $LIBVER | awk -F: '{print $1}')
LIBVER_r=$(echo $LIBVER | awk -F: '{print $2}')
LIBVER_a=$(echo $LIBVER | awk -F: '{print $3}')
LIBSTDCPP_DLLVER=$(($LIBVER_c - $LIBVER_a))

## no need for a DLLVER for libgcc; it's guaranteed to only add functions,
## never remove or change thier signature.  So it'll always be backwards-compatible.

## It's probably not necessary, but we'll use the LIBSTDCPP_DLLVER for 
## libsupc++ as well (after all, all of libsupc++ appears IN libstdc++
## so if libsupc++ changes in a backwards-non-compatible way, then libstdc++
## will, too -- and the gcc folks will modify its LIBVER.  The downside here
## is that if libsupc++ is unchanged or remains backwards compatible, but
## some other part of libstdc++ changes badly -- we will unnecessarily bump
## libsupc++'s DLLNUM.  'sokay.


${builddir}/stage3-gcc/xgcc -shared -olibstdc++-${LIBSTDCPP_DLLVER}.dll \
  -Wl,--out-implib,libstdc++-${LIBSTDCPP_DLLVER}.dll.a \
  ./libstdc++.def ./libstdc++.a
ln libstdc++-${LIBSTDCPP_DLLVER}.dll.a libstdc++.dll.a

${builddir}/stage3-gcc/xgcc -shared -olibsupc++-${LIBSTDCPP_DLLVER}.dll \
  -Wl,--out-implib,libsupc++-${LIBSTDCPP_DLLVER}.dll.a \
  ./libsupc++.def ./libsupc++.a
ln libsupc++-${LIBSTDCPP_DLLVER}.dll.a libsupc++.dll.a

${builddir}/stage3-gcc/xgcc -shared -olibgcc.dll \
  -Wl,--out-implib,libgcc.dll.a \
  ./libgcc.def ./libgcc.a
#no versioned implib, no need to ln

cd debug
${builddir}/stage3-gcc/xgcc -shared -olibstdc++-${LIBSTDCPP_DLLVER}.dll \
  -Wl,--out-implib,libstdc++-${LIBSTDCPP_DLLVER}.dll.a \
  ./libstdc++.def ./libstdc++.a
ln libstdc++-${LIBSTDCPP_DLLVER}.dll.a libstdc++.dll.a
cd ..

## for shared fortran, go here (and you'll need your intact build directory!
## http://www.g95.org/src.html#Support


## MUNGE the .la files
mv libstdc++.la libstdc++.la.SAVE
cat libstdc++.la.SAVE |\
   sed -e "s/^dlname=.*\$/dlname='libstdc++-${LIBSTDCPP_DLLVER}.dll'/" \
       -e "s/^library_names=.*\$/library_names='libstdc++.dll.a'/" >\
   libstdc++.la

mv libsupc++.la libsupc++.la.SAVE
cat libsupc++.la.SAVE |\
   sed -e "s/^dlname=.*\$/dlname='libsupc++-${LIBSTDCPP_DLLVER}.dll'/" \
       -e "s/^library_names=.*\$/library_names='libsupc++.dll.a'/" >\
   libsupc++.la

cd debug
mv libstdc++.la libstdc++.la.SAVE
cat libstdc++.la.SAVE |\
   sed -e "s/^dlname=.*\$/dlname='libstdc++-${LIBSTDCPP_DLLVER}.dll'/" \
       -e "s/^library_names=.*\$/library_names='libstdc++.dll.a'/" >\
   libstdc++.la
cd ..

## And create the links (curdir is ${instdir}/mingw/gcc/mingw32/4.1.0)
pushd ${instdir}/mingw/bin

ln ../lib/gcc/mingw32/4.1.0/libstdc++-${LIBSTDCPP_DLLVER}.dll .
ln ../lib/gcc/mingw32/4.1.0/libsupc++-${LIBSTDCPP_DLLVER}.dll .
ln ../lib/gcc/mingw32/4.1.0/libgcc.dll .

popd
popd