Bug 5434
| Summary: | Problem with FILEs and/or shared libraries | ||
|---|---|---|---|
| Product: | [Retired] Red Hat Linux | Reporter: | armand.bendanan |
| Component: | libc | Assignee: | Cristian Gafton <gafton> |
| Status: | CLOSED WORKSFORME | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | 6.0 | ||
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i386 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 1999-10-05 06:34:48 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
|
Description
armand.bendanan
1999-09-29 12:05:08 UTC
I am sorry, it is not a mandrake version, but a red hat 6.0 version.
As I don't know how to send you my files, here they are :
------------------------- file : makefile:
CPPFLAGS = -g
CC = gcc
LIBRARY = libalib.so
PROGRAM = main
OBJECTS = inlib.o main.o
TARGETS = $(OBJECTS) $(LIBRARY) $(PROGRAM)
all : $(TARGETS)
clean :
rm core $(TARGETS) 2> /dev/null
$(PROGRAM) : main.o $(LIBRARY)
$(CC) -o $@ main.o $(LIBRARY)
$(LIBRARY) : inlib.o
ld -o $@ -G inlib.o
inlib.o : inlib.c
main.o : main.c inlib.h
------------------------- file : inlib.h
#ifndef _IN_LIB_H_
#define _IN_LIB_H_
extern int read_file (char *file);
#endif
------------------------- file : inlib.c:
#include <stdio.h>
#include "inlib.h"
extern int read_file (char *file_name)
{
FILE *fd = fopen(file_name, "r");
if (fd == NULL) {
printf("error opening file:%s\n", file_name);
return 1;
}
fclose (fd);
return 0;
}
------------------------- file : main.c:
#include <stdio.h>
#include "inlib.h"
FILE *msgf = NULL;
int main (int argc, char **argv)
{
char *file_name = "file.txt";
/******************************************************
* if I uncomment the following lines, the program works ??? !!!
******************************************************/
/************
FILE *fd = fopen(file_name, "r");
if (fd == NULL) {
printf("error opening file:%s\n", file_name);
return 1;
}
fclose (fd);
**************/
if (read_file (file_name) != 0) {
printf ("Exit\n");
exit (1);
}
/******************************************************
* if I comment the following 3 lines, the program works ??? !!!
******************************************************/
if (msgf == NULL) {
msgf = fopen ("/dev/null", "w");
}
printf ("################### WON ==============\n");
fflush (stdout);
return 0;
}
Works for me, provided that you are actually using -fPIC compiler option and -shared linker option to generate correctly the shared library. I don't know about Mandrake - one thing I know for sure is that their optimized compiler is screwing up big time glibc on their system (and not only that, but we won't get into that) |