While trying to configure Octave on an OS X system, I ran into the
following problem:
checking for Fortran 77 libraries... -lcrt1.o
-L/opt/local/lib/gcc-lib/powerpc-apple-darwin6.6/3.2.2
-L/opt/local/lib/gcc-lib/powerpc-apple-darwin6.6/3.2.2/../../.. -lm -lfrtbegin -lg2c
-lSystem
checking for dummy main to link with Fortran 77 libraries... unknown
configure: error: Linking to Fortran libraries from C fails.
Looking at config.log, I see
configure:5926: gcc -o conftest -g -O2 conftest.c -lm -lcrt1.o
-L/opt/local/lib/gcc-lib/powerpc-apple-darwin6.6/3.2.2
-L/opt/local/lib/gcc-lib/powerpc-apple-darwin6.6/3.2.2/../../.. -lm -lfrtbegin -lg2c
-lSystem >&5
ld: multiple definitions of symbol _NXArgc
/usr/lib/crt1.o definition of _NXArgc in section (__DATA,__data)
/usr/lib/crt1.o definition of _NXArgc in section (__DATA,__data)
ld: multiple definitions of symbol _NXArgv
/usr/lib/crt1.o definition of _NXArgv in section (__DATA,__data)
/usr/lib/crt1.o definition of _NXArgv in section (__DATA,__data)
ld: multiple definitions of symbol ___progname
/usr/lib/crt1.o definition of ___progname in section (__DATA,__data)
/usr/lib/crt1.o definition of ___progname in section (__DATA,__data)
ld: multiple definitions of symbol __dyld_func_lookup
/usr/lib/crt1.o private external definition of __dyld_func_lookup in section
(__TEXT,__text)
/usr/lib/crt1.o private external definition of __dyld_func_lookup in section
(__TEXT,__text)
ld: multiple definitions of symbol __dyld_init_check
/usr/lib/crt1.o private external definition of __dyld_init_check in section
(__TEXT,__text)
/usr/lib/crt1.o private external definition of __dyld_init_check in section
(__TEXT,__text)
ld: multiple definitions of symbol __start
/usr/lib/crt1.o private external definition of __start in section (__TEXT,__text)
/usr/lib/crt1.o private external definition of __start in section (__TEXT,__text)
ld: multiple definitions of symbol _environ
/usr/lib/crt1.o definition of _environ in section (__DATA,__data)
/usr/lib/crt1.o definition of _environ in section (__DATA,__data)
ld: multiple definitions of symbol dyld_stub_binding_helper
/usr/lib/crt1.o private external definition of dyld_stub_binding_helper in section
(__TEXT,__text)
/usr/lib/crt1.o private external definition of dyld_stub_binding_helper in section
(__TEXT,__text)
ld: multiple definitions of symbol start
/usr/lib/crt1.o definition of start in section (__TEXT,__text)
/usr/lib/crt1.o definition of start in section (__TEXT,__text)
configure:5929: $? = 1
The problem seems to be that gcc adds -lcrt1.o to the link command and
listing it a second time causes the above errors. The following patch
avoids the problem:
2003-07-25 John W. Eaton <[EMAIL PROTECTED]>
* lib/autoconf/fortran.m4 (AC_F77_LIBRARY_LDFLAGS): Also ignore
-lcrt1.o, for OS X.
Index: fortran.m4
===================================================================
RCS file: /cvsroot/autoconf/autoconf/lib/autoconf/fortran.m4,v
retrieving revision 1.165
diff -u -r1.165 fortran.m4
--- fortran.m4 22 May 2003 15:17:05 -0000 1.165
+++ fortran.m4 25 Jul 2003 17:56:45 -0000
@@ -487,7 +487,7 @@
[_AC_LINKER_OPTION([$ac_arg], ac_cv_flibs)])
;;
# Ignore these flags.
- -lang* | -lcrt0.o | -lc | -lgcc | -libmil | -LANG:=*)
+ -lang* | -lcrt[01].o | -lc | -lgcc | -libmil | -LANG:=*)
;;
-lkernel32)
test x"$CYGWIN" != xyes && ac_cv_flibs="$ac_cv_flibs $ac_arg"
Thanks,
jwe
--
www.octave.org | Unfortunately we were hopelessly optimistic in 1954
www.che.wisc.edu/~jwe | about the problems of debugging FORTRAN programs.
| -- J. Backus
