zhao@wiener.usc.edu (05/04/89)
This short program shows a possible misplacement of math library when
ld++ tries to load it. Swapping "-lg++" and "-lm" eliminates the
problem.
This is run in a SUN3/60M OS4.0.1 using the normal ld.c (not newld.c)
Script started on Wed May 3 17:04:19 1989
[1]: cat bug1.c
#include <stream.h>
#include <Complex.h>
main (void) {
Complex a(2, 4), b(3, 5);
Complex c = a + b;
cout << a << " + " << b << " = " << c << "\n";
}
[2]: g++ -g -v -c bug1.c
g++ version 1.35.0-
/home/wiener/local/lib/gcc-cpp -+ -v -undef -D__GNU__ -D__GNUG__ -Dmc68000 -Dsun -Dunix -D__mc68000__ -D__sun__ -D__unix__ -D__HAVE_68881__ -Dmc68020 bug1.c /tmp/cca04788.cpp
GNU CPP version 1.35
/home/wiener/local/lib/gcc-c++ /tmp/cca04788.cpp -quiet -dumpbase bug1.c -noreg -version -G -o /tmp/cca04788.s
GNU C++ version 1.35.0- (68k, MIT syntax) compiled by GNU C version 1.34.91.
as -mc68020 /tmp/cca04788.s -o bug1.o
[3]: g++ -v -o bug1 bug1.o -lm
g++ version 1.35.0-
/home/wiener/local/lib/gcc-ld++ -o bug1 -C -dc -dp /home/wiener/local/lib/gcc-crt0+.o /lib/Mcrt1.o bug1.o -lm -lg++ /home/wiener/local/lib/gcc-gnulib -lc
Undefined symbols:
_log
_sqrt
_atan2
_sinh
_sin
_cos
_cosh
_exp
_hypot
[4]: /home/wiener/local/lib/gcc-ld++ -o bug1 -C -dc -dp /home/wiener/local/lib/gcc-crt0+.o /lib/Mcrt1.o bug1.o -lg++ -lm /home/wiener/local/lib/gcc-gnulib -lc
[5]: bug1
(2, 4) + (3, 5) = (5, 9)
[6]: exit
[7]:
script done on Wed May 3 17:06:04 1989