Hi list, At the moment I am stuck building a cygwin gcc compiler that runs on Linux and creates cygwin executables.
Here's what I did: Downloaded and installed binutils: git clone --depth 1 -b master https://sourceware.org/git/binutils-gdb.git binutils cd binutils ./configure --prefix=/home/johannes/cygwin-build-gcc/sysroot/ --disable-shared --enable-static --with-sysroot=/home/johannes/cygwin-build-gcc/sysroot/ --target=x86_64-pc-cygwin --disable-multilib --disable-nls --enable-lto --disable-gdb make -j 10 make install which went fine. Now after trying to compile gcc it (later) complains about missing windows.h header. So I downloaded and installed the MinGW-w64 package, configured and installed it (also to this sysroot but in the x86_64-pc-cygwin directory: git clone --depth 1 -b master https://git.code.sf.net/p/mingw-w64/mingw-w64 mingw-w64 cd mingw-w64 ./configure --build=x86_64-pc-linux-gnu --host=x86_64-w64-mingw32 \ --prefix=/home/johannes/cygwin-build-gcc/sysroot/x86_64-pc-cygwin --without-crt make install (I also tried with --host=x86_64-pc-cygwin) Question: As far as I understood it, installing the MinGW headers is a prerequisite to building a x86_64-pc-cygwin cross compiler (because libgcc will need certain windows headers). Is that correct? Then I tried various gcc configure options: git clone --depth 1 -b releases/gcc-14 https://gcc.gnu.org/git/gcc.git gcc cd gcc ./contrib/download_prerequisites ../configure --target=x86_64-pc-cygwin --host=x86_64-pc-linux --disable-shared \ --enable-static --disable-multilib --prefix=/home/johannes/cygwin-build-gcc/sysroot/ \ --enable-languages=c,c++ --disable-nls --enable-threads=posix \ --with-newlib=/home/johannes/cygwin-build-gcc/newlib-cygwin \ --with-cygwin=/home/johannes/cygwin-build-gcc/newlib-cygwin --with-system-libunwind make -j 8 Building gcc (xgcc) works fine but when the stage1 compiler tries to compile libgcc I get lots of errors complaining about certain types not found: Compiler command line is: /home/johannes/cygwin-build-gcc/gcc/build/./gcc/xgcc \ -B/home/johannes/cygwin-build-gcc/gcc/build/./gcc/ \ -B/home/johannes/cygwin-build-gcc/sysroot/x86_64-pc-cygwin/bin/ \ -B/home/johannes/cygwin-build-gcc/sysroot/x86_64-pc-cygwin/lib/ \ -isystem /home/johannes/cygwin-build-gcc/sysroot/x86_64-pc-cygwin/include \ -isystem /home/johannes/cygwin-build-gcc/sysroot/x86_64-pc-cygwin/sys-include \ -g -O2 -O2 -I../../../libgcc/../winsup/w32api/include -I../../../libgcc/../winsup/include \ -I../../../libgcc/../winsup/cygwin/include -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE \ -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes \ -Wold-style-definition -isystem ./include -g -DIN_LIBGCC2 -fbuilding-libgcc \ -fno-stack-protector -Dinhibit_libc -I. -I. -I../.././gcc -I../../../libgcc \ -I../../../libgcc/. -I../../../libgcc/../gcc -I../../../libgcc/../include \ -I../../../libgcc/config/libbid -DENABLE_DECIMAL_BID_FORMAT -DHAVE_CC_TLS -DUSE_EMUTLS \ -o unwind-seh.o -MT unwind-seh.o -MD -MP -MF unwind-seh.dep -fexceptions -c \ ../../../libgcc/unwind-seh.c First few error outputs are: In file included from /home/johannes/cygwin-build-gcc/sysroot/x86_64-pc-cygwin/include/winnt.h:16, from /home/johannes/cygwin-build-gcc/sysroot/x86_64-pc-cygwin/include/minwindef.h:163, from /home/johannes/cygwin-build-gcc/sysroot/x86_64-pc-cygwin/include/windef.h:9, from /home/johannes/cygwin-build-gcc/sysroot/x86_64-pc-cygwin/include/windows.h:69, from ./unwind.h:34, from ../../../libgcc/unwind-seh.c:29: /home/johannes/cygwin-build-gcc/sysroot/x86_64-pc-cygwin/include/ctype.h:43:17:error: unknown type name 'wctype_t' 43 | _CRTIMP const wctype_t * __cdecl __pwctype_func(void); | ^~~~~~~~ /home/johannes/cygwin-build-gcc/sysroot/x86_64-pc-cygwin/include/ctype.h:123:24 error: unknown type name 'wint_t' 123 | int __cdecl iswalpha(wint_t _C); | ^~~~~~ /home/johannes/cygwin-build-gcc/sysroot/x86_64-pc-cygwin/include/ctype.h:124:24 error: unknown type name 'wint_t' 124 | int __cdecl iswupper(wint_t _C); | ^~~~~~ followed by many others. Researching a bit showed that there is a _cygwin.h header that #defines _INTPTR_T_DEFINED to prevent corecrt.h to typedef intptr_t. But in my case the cygwin headers are not included. I also tried to symlink winsup to the gcc root directory: same result plus a non-existent header: ../../../libgcc/../winsup/cygwin/include/features.h:13:10: fatal error: sys/features.h: No such file or directory 13 | #include <sys/features.h> Is there a web resource that explains how to create a cygwin cross compiler for Linux? Or even better a shell script that does it? What should I do to fix the intptr_t issue? Thanks for any insights, Best regards, - Johannes -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
