From mboxrd@z Thu Jan  1 00:00:00 1970
From: tobias_meier@my-deja.com
To: help-gcc@gnu.org
Subject: Problems with math.h
Date: Fri, 07 Jan 2000 00:46:00 -0000
Message-id: <85483i$a32$1@nnrp1.deja.com>
X-SW-Source: 2000-01/msg00083.html

Hi all,

compiling this program with the command:

gcc MatheTest.c

/* Program MatheTest.c*/
#include <stdio.h>
#include <stdlib.h>
#include <float.h>
#include <math.h>

main()
{
printf("Ergebnis %f \n", exp(2.3));
printf("Ergebnis %f \n", pow(2,3));
}

/* End Program */

I get:

cd /home/tmeier/C/Projekt01/
gcc MatheTest.c
/tmp/ccdP8Uys.o: In function `main':
/tmp/ccdP8Uys.o(.text+0xe): undefined reference to `exp'
/tmp/ccdP8Uys.o(.text+0x37): undefined reference to `pow'
collect2: ld returned 1 exit status

Compilation exited abnormally with code 1 at Thu Jan  6 22:27:58


 -> problems with math.h

looking up search dirs with command:

gcc -print-search-dirs

I get:

install: /usr/lib/gcc-lib/i486-linux/egcs-2.91.60/
programs: /usr/lib/gcc-lib/i486-linux/egcs-2.91.60/:/usr/lib/gcc-
lib/i486-linux/:/usr/lib/gcc/i486-linux/egcs-2.91.60/:/usr/lib/gcc/i486-
linux/:/usr/i486-linux/bin/i486-linux/egcs-2.91.60/:/usr/i486-linux/bin/
libraries: /usr/lib/gcc-lib/i486-linux/egcs-2.91.60/:/usr/lib/gcc/i486-
linux/egcs-2.91.60/:/usr/i486-linux/lib/i486-linux/egcs-
2.91.60/:/usr/i486-linux/lib/:/usr/lib/i486-linux/egcs-
2.91.60/:/usr/lib/:/lib/i486-linux/egcs-2.91.60/:/lib/:/usr/lib/i486-
linux/egcs-2.91.60/:/usr/lib/

searching math.h I get:
/usr/include/math.h

Ok, using option -B for gcc:

gcc -B /usr/include/math.h MatheTest.c

I get:

cd /home/tmeier/C/Projekt01/
gcc -B /usr/include/math.h MatheTest.c
/tmp/ccOFzmvH.o: In function `main':
/tmp/ccOFzmvH.o(.text+0xe): undefined reference to `exp'
/tmp/ccOFzmvH.o(.text+0x37): undefined reference to `pow'
collect2: ld returned 1 exit status
gcc: file path prefix `/usr/include/math.h' never used

Compilation exited abnormally with code 1 at Thu Jan  6 22:41:52

Compiling with g++ works:

But g++ has the same search path as gcc has !

g++ serch dirs (g++ -print-search-dirs)
install: /usr/lib/gcc-lib/i486-linux/egcs-2.91.60/
programs: /usr/lib/gcc-lib/i486-linux/egcs-2.91.60/:/usr/lib/gcc-
lib/i486-linux/:/usr/lib/gcc/i486-linux/egcs-2.91.60/:/usr/lib/gcc/i486-
linux/:/usr/i486-linux/bin/i486-linux/egcs-2.91.60/:/usr/i486-linux/bin/
libraries: /usr/lib/gcc-lib/i486-linux/egcs-2.91.60/:/usr/lib/gcc/i486-
linux/egcs-2.91.60/:/usr/i486-linux/lib/i486-linux/egcs-
2.91.60/:/usr/i486-linux/lib/:/usr/lib/i486-linux/egcs-
2.91.60/:/usr/lib/:/lib/i486-linux/egcs-2.91.60/:/lib/:/usr/lib/i486-
linux/egcs-2.91.60/:/usr/lib/


Who knows what to do ?


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Before you buy.

From mboxrd@z Thu Jan  1 00:00:00 1970
From: tobias_meier@my-deja.com
To: help-gcc@gnu.org
Subject: Problems with math.h
Date: Sat, 01 Apr 2000 00:00:00 -0000
Message-ID: <85483i$a32$1@nnrp1.deja.com>
X-SW-Source: 2000-q1/msg00083.html
Message-ID: <20000401000000.BTcZIf6gcjvMIo4g28fI1h2-4dTmK_qj9wvdO0_eU1U@z>

Hi all,

compiling this program with the command:

gcc MatheTest.c

/* Program MatheTest.c*/
#include <stdio.h>
#include <stdlib.h>
#include <float.h>
#include <math.h>

main()
{
printf("Ergebnis %f \n", exp(2.3));
printf("Ergebnis %f \n", pow(2,3));
}

/* End Program */

I get:

cd /home/tmeier/C/Projekt01/
gcc MatheTest.c
/tmp/ccdP8Uys.o: In function `main':
/tmp/ccdP8Uys.o(.text+0xe): undefined reference to `exp'
/tmp/ccdP8Uys.o(.text+0x37): undefined reference to `pow'
collect2: ld returned 1 exit status

Compilation exited abnormally with code 1 at Thu Jan  6 22:27:58


 -> problems with math.h

looking up search dirs with command:

gcc -print-search-dirs

I get:

install: /usr/lib/gcc-lib/i486-linux/egcs-2.91.60/
programs: /usr/lib/gcc-lib/i486-linux/egcs-2.91.60/:/usr/lib/gcc-
lib/i486-linux/:/usr/lib/gcc/i486-linux/egcs-2.91.60/:/usr/lib/gcc/i486-
linux/:/usr/i486-linux/bin/i486-linux/egcs-2.91.60/:/usr/i486-linux/bin/
libraries: /usr/lib/gcc-lib/i486-linux/egcs-2.91.60/:/usr/lib/gcc/i486-
linux/egcs-2.91.60/:/usr/i486-linux/lib/i486-linux/egcs-
2.91.60/:/usr/i486-linux/lib/:/usr/lib/i486-linux/egcs-
2.91.60/:/usr/lib/:/lib/i486-linux/egcs-2.91.60/:/lib/:/usr/lib/i486-
linux/egcs-2.91.60/:/usr/lib/

searching math.h I get:
/usr/include/math.h

Ok, using option -B for gcc:

gcc -B /usr/include/math.h MatheTest.c

I get:

cd /home/tmeier/C/Projekt01/
gcc -B /usr/include/math.h MatheTest.c
/tmp/ccOFzmvH.o: In function `main':
/tmp/ccOFzmvH.o(.text+0xe): undefined reference to `exp'
/tmp/ccOFzmvH.o(.text+0x37): undefined reference to `pow'
collect2: ld returned 1 exit status
gcc: file path prefix `/usr/include/math.h' never used

Compilation exited abnormally with code 1 at Thu Jan  6 22:41:52

Compiling with g++ works:

But g++ has the same search path as gcc has !

g++ serch dirs (g++ -print-search-dirs)
install: /usr/lib/gcc-lib/i486-linux/egcs-2.91.60/
programs: /usr/lib/gcc-lib/i486-linux/egcs-2.91.60/:/usr/lib/gcc-
lib/i486-linux/:/usr/lib/gcc/i486-linux/egcs-2.91.60/:/usr/lib/gcc/i486-
linux/:/usr/i486-linux/bin/i486-linux/egcs-2.91.60/:/usr/i486-linux/bin/
libraries: /usr/lib/gcc-lib/i486-linux/egcs-2.91.60/:/usr/lib/gcc/i486-
linux/egcs-2.91.60/:/usr/i486-linux/lib/i486-linux/egcs-
2.91.60/:/usr/i486-linux/lib/:/usr/lib/i486-linux/egcs-
2.91.60/:/usr/lib/:/lib/i486-linux/egcs-2.91.60/:/lib/:/usr/lib/i486-
linux/egcs-2.91.60/:/usr/lib/


Who knows what to do ?


Sent via Deja.com http://www.deja.com/
Before you buy.