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Subject:	Re: DJGPP cross compilers for open-source hardware
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於 2013/9/4 上午 12:36, Andris Pavenis 提到:
>
> You can use the same approach as I did with building RPM packages - not
> use installed GMP, MPFR (and MPC for later GCC versions) at all but
> build accepable versions as static libraries and link with them.
>
> Andris
>

We are following your approach to build gcc 4.3.2 under Cygwin, and 
today the compiling fails again at the same place (when linking 
cc1-dummy.exe):

--- error messages ---
/usr/src/rpm/BUILD/djcross-gcc-4.3.2/tmpbuild/./prev-gcc/xgcc 
-B/usr/src/rpm/BUILD/djcross-gcc-4.3.2/tmpbuild/./prev-gcc/ 
-B/usr/src/rpm/BUILD/djcross-gcc-4.3.2/tmpinst/i686-pc-cygwin/bin/    -g 
-O2 -DIN_GCC   -W -Wall -Wwrite-strings -Wstrict-prototypes 
-Wmissing-prototypes -Wold-style-definition -Wmissing-format-attribute 
-pedantic -Wno-long-long -Wno-variadic-macros 
-Wno-overlength-strings    -DHAVE_CONFIG_H  -o cc1-dummy.exe c-lang.o 
stub-objc.o attribs.o c-errors.o c-lex.o c-pragma.o c-decl.o c-typeck.o 
c-convert.o c-aux-info.o c-common.o c-opts.o c-format.o c-semantics.o 
c-incpath.o cppdefault.o c-ppoutput.o c-cppbuiltin.o prefix.o 
c-objc-common.o c-dump.o c-pch.o c-parser.o cygwin2.o  c-gimplify.o 
tree-mudflap.o c-pretty-print.o c-omp.o dummy-checksum.o main.o 
libbackend.a ../libcpp/libcpp.a ../libdecnumber/libdecnumber.a ../libc
pp/libcpp.a -lintl  ../libiberty/libiberty.a 
../libdecnumber/libdecnumber.a 
-L/usr/src/rpm/BUILD/djcross-gcc-4.3.2/tmpinst/lib 
-L/usr/src/rpm/BUILD/djcross-gcc-4.3.2/tmpinst/lib -lmpfr -lgmp
/usr/src/rpm/BUILD/djcross-gcc-4.3.2/tmpinst

/lib/libmpfr.a(get_str.o):get_str.c:
(.text+0x18e): undefined reference to '___chkstk_ms'
/usr/src/rpm/BUILD/djcross-gcc-4.3.2/tmpinst/lib/libmpfr.a(get_str.o):get_str.c:
(.text+0x4cd): undefined reference to '___chkstk_ms'
/usr/src/rpm/BUILD/djcross-gcc-4.3.2/tmpinst/lib/libmpfr.a(get_str.o):get_str.c:
(.text+0x985): undefined reference to '___chkstk_ms'
/usr/src/rpm/BUILD/djcross-gcc-4.3.2/tmpinst/lib/libmpfr.a(get_str.o):get_str.c:
(.text+0xac6): undefined reference to '___chkstk_ms'
/usr/src/rpm/BUILD/djcross-gcc-4.3.2/tmpinst/lib/libmpfr.a(get_str.o):get_str.c:
(.text+0xb8c): undefined reference to '___chkstk_ms'
/usr/src/rpm/BUILD/djcross-gcc-4.3.2/tmpinst/lib/libmpfr.a(get_str.o):get_str.c:
(.text+0xbb5): more undefined references '___chkstk_ms'
------

The '___chkstk_ms' is in libgcc.a, and so we add manually -L -lgcc to 
the above xgcc command line and then the linking of cc1-dummy.exe 
successes. It seems that the makefile should be patched for Cygwin. We 
will try this and report later. :)


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