http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60544
Bug ID: 60544
Summary: libcmain.c:39: undefined reference to `WinMain'
Product: gcc
Version: 4.8.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: zosrothko at orange dot fr
Hi
On a cygwin/win7/x86-64 platform, linking a c++ program with
g++ -Wl,-trace-symbol=main -o "CobolParser.exe" ./src/CharStream.o
./src/CobolParser.o ./src/CobolParserTokenManager.o ./src/ParseException.o
./src/Token.o ./src/TokenMgrError.o
produces this error
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../lib/crt0.o: reference to main
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../lib/libcygwin.a(libcmain.o):
definition of main
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../lib/libcygwin.a(libcmain.o): In
function `main':
/usr/src/debug/cygwin-1.7.28-2/winsup/cygwin/lib/libcmain.c:39: undefined
reference to `WinMain'
/usr/src/debug/cygwin-1.7.28-2/winsup/cygwin/lib/libcmain.c:39:(.text.startup+0x7e):
relocation truncated to fit: R_X86_64_PC32 against undefined symbol `WinMain'
collect2: error: ld returned 1 exit status
makefile:45: recipe for target 'CobolParser.exe' failed
make: *** [CobolParser.exe] Error 1
In fact, while the CobolParser.o *has* a main entry point, it seems that the
linker is looking for the "main" reference in the libcygwin.a before
CobolParser.o which leads to this error. Or did I miss something?
here the detail configuration:
$ g++ -v -Wl,-trace-symbol=main -o "CobolParser.exe" ./src/CharStream.o
./src/CobolParser.o ./src/CobolParserTokenManager.o ./src/ParseException.o
./src/Token.o ./src/TokenMgrError.o
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/lto-wrapper.exe
Target: x86_64-pc-cygwin
Configured with:
/cygdrive/i/szsz/tmpp/cygwin64/gcc/gcc-4.8.2-3/src/gcc-4.8.2/configure
--srcdir=/cygdrive/i/szsz/tmpp/cygwin64/gcc/gcc-4.8.2-3/src/gcc-4.8.2
--prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin
--libexecdir=/usr/libexec --datadir=/usr/share --localstatedir=/var
--sysconfdir=/etc --libdir=/usr/lib --datarootdir=/usr/share
--docdir=/usr/share/doc/gcc --htmldir=/usr/share/doc/gcc/html -C
--build=x86_64-pc-cygwin --host=x86_64-pc-cygwin --target=x86_64-pc-cygwin
--without-libiconv-prefix --without-libintl-prefix --enable-shared
--enable-shared-libgcc --enable-static --enable-version-specific-runtime-libs
--enable-bootstrap --disable-__cxa_atexit --with-dwarf2 --with-tune=generic
--enable-languages=ada,c,c++,fortran,lto,objc,obj-c++ --enable-graphite
--enable-threads=posix --enable-libatomic --enable-libgomp --disable-libitm
--enable-libquadmath --enable-libquadmath-support --enable-libssp
--enable-libada --enable-libgcj-sublibs --disable-java-awt --disable-symvers
--with-ecj-jar=/usr/share/java/ecj.jar --with-gnu-ld --with-gnu-as
--with-cloog-include=/usr/include/cloog-isl --without-libiconv-prefix
--without-libintl-prefix --with-system-zlib --libexecdir=/usr/lib
Thread model: posix
gcc version 4.8.2 (GCC)
COMPILER_PATH=/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/:/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/:/usr/lib/gcc/x86_64-pc-cygwin/:/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/:/usr/lib/gcc/x86_64-pc-cygwin/:/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/bin/
LIBRARY_PATH=/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/:/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/lib/../lib/:/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../lib/:/lib/../lib/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/lib/:/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-o' 'CobolParser.exe' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/collect2.exe -m i386pep --wrap _Znwm
--wrap _Znam --wrap _ZdlPv --wrap _ZdaPv --wrap _ZnwmRKSt9nothrow_t --wrap
_ZnamRKSt9nothrow_t --wrap _ZdlPvRKSt9nothrow_t --wrap _ZdaPvRKSt9nothrow_t
-Bdynamic --dll-search-prefix=cyg --tsaware -o CobolParser.exe
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../lib/crt0.o
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/crtbegin.o
-L/usr/lib/gcc/x86_64-pc-cygwin/4.8.2
-L/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/lib/../lib
-L/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../lib -L/lib/../lib
-L/usr/lib/../lib
-L/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/lib
-L/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../.. -trace-symbol=main
./src/CharStream.o ./src/CobolParser.o ./src/CobolParserTokenManager.o
./src/ParseException.o ./src/Token.o ./src/TokenMgrError.o -lstdc++ -lgcc_s
-lgcc -lcygwin -ladvapi32 -lshell32 -luser32 -lkernel32 -lgcc_s -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/crtend.o
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../lib/crt0.o: reference to main
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../lib/libcygwin.a(libcmain.o):
definition of main
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../lib/libcygwin.a(libcmain.o): In
function `main':
/usr/src/debug/cygwin-1.7.28-2/winsup/cygwin/lib/libcmain.c:39: undefined
reference to `WinMain'
/usr/src/debug/cygwin-1.7.28-2/winsup/cygwin/lib/libcmain.c:39:(.text.startup+0x7e):
relocation truncated to fit: R_X86_64_PC32 against undefined symbol `WinMain'
collect2: error: ld returned 1 exit status
