Originally posted by: SystemAdmin

Wondering if anyone can help me. Have recently upgraded AIX to v5.3tl09, but we are now having problems with the c compiler. Upgraded this to v9 but also have v6 running on some machine, all give the same results.

Trying to compile the following test program:

#include <stdio.h>
#include <math.h>

int main(char **args)

{
double f = floor(20/6);
printf("Hello world, 20/6 ~= %2.1f\n",f);
}

However when I run the following command I get these results:

1. cc -bnoquiet adv_hello_world.c -o adv_hello_world

(ld): halt 4
(ld): setfflag 4
(ld): savename adv_hello_world
(ld): filelist 5 1
(ld): i /lib/crt0.o
(ld): i adv_hello_world.o
(ld): lib /usr/vac/lib/libxlopt.a
(ld): lib /usr/vac/lib/libxl.a
(ld): lib /usr/lib/libc.a
LIBRARY: Shared object libc.ahttp://shr.o: 2874 symbols imported.
LIBRARY: Shared object libc.ahttp://meth.o: 2 symbols imported.
LIBRARY: Shared object libc.ahttp://posix_aio.o: 20 symbols imported.
LIBRARY: Shared object libc.ahttp://aio.o: 18 symbols imported.
LIBRARY: Shared object libc.ahttp://pse.o: 5 symbols imported.
LIBRARY: Shared object libc.ahttp://dl.o: 4 symbols imported.
LIBRARY: Shared object libc.ahttp://pty.o: 1 symbols imported.
FILELIST: Number of previously inserted files processed: 5
(ld): resolve
RESOLVE: 38 of 6027 symbols were kept.
(ld): addgl /usr/lib/glink.o
ADDGL: Glink code added for 4 symbols.
(ld): er full
ld: 0711-318 ERROR: Undefined symbols were found.
The following symbols are in error:
Symbol Inpndx TY CL Source-File(Object-File) OR Import-File{Shared-object}
RLD: Address Section Rld-type Referencing Symbol

---

.floor 28 ER PR adv_hello_world.c(adv_hello_world.o)
00000024 .text R_RBR 12 .main
ER: The return code is 8.
I'm hoping that someone can shed some light on it for me.

Cheers
Russell
#AIX-Forum

Originally posted by: flodstrom

I don't have access to the xlc right now, but it looks like you are missing the math lib?

Try...

cc -bnoquiet adv_hello_world.c -o adv_hello_world -lm
#AIX-Forum

Originally posted by: SystemAdmin

Results:
#cc -bnoquiet adv_hello_world.c -o adv_hello_world -lm
(ld): halt 4
(ld): setfflag 4
(ld): savename adv_hello_world
(ld): filelist 6 1
(ld): i /lib/crt0.o
(ld): i adv_hello_world.o
(ld): lib /usr/lib/libm.a
(ld): lib /usr/vac/lib/libxlopt.a
(ld): lib /usr/vac/lib/libxl.a
(ld): lib /usr/lib/libc.a
LIBRARY: Shared object libc.ahttp://shr.o: 2870 symbols imported.
LIBRARY: Shared object libc.ahttp://meth.o: 2 symbols imported.
LIBRARY: Shared object libc.ahttp://posix_aio.o: 20 symbols imported.
LIBRARY: Shared object libc.ahttp://aio.o: 18 symbols imported.
LIBRARY: Shared object libc.ahttp://pse.o: 5 symbols imported.
LIBRARY: Shared object libc.ahttp://dl.o: 4 symbols imported.
LIBRARY: Shared object libc.ahttp://pty.o: 1 symbols imported.
FILELIST: Number of previously inserted files processed: 6
(ld): resolve
RESOLVE: 71 of 7235 symbols were kept.
(ld): addgl /usr/lib/glink.o
ADDGL: Glink code added for 15 symbols.
(ld): er full
ER: There are no unresolved symbols.
(ld): mismatch
MISMATCH: No type mismatches exist.
(ld): comprld
COMPRLD: Kept 111 of 111 relocation entries.
(ld): origin page 0x10000000 0x20000000
(ld): libpath /usr/vac/lib:/usr/lib:/lib
LIBPATH: Library path set to /usr/vac/lib:/usr/lib:/lib
(ld): save 1L .
SAVE: Section sizes = 3464+528+4 (0xD88+0x210+0x4 hex)
SAVE: Size of TOC: 144 (0x90 hex)
(ld): rc
RC: Highest return code was 0.
#AIX-Forum

Originally posted by: flodstrom

...so did it generate a binary for you? I don't see any error's in the output example.
#AIX-Forum

Originally posted by: shargus

Your C program is doing floating-point math, yet your original cc statement does not include the "-lm", so the list of libraries included does not include /usr/lib/libm. That is probably the source of the unresolved symbols.

The second time you ran cc, the "-lm" was on the end of the line. That instructed the C compiler to include the math library (/usr/lib/libm), which appears to be what the compiler needed.
#AIX-Forum