zlib.h in custom path

Shell Programming and Scripting
1

I am trying to configure gpac. I get the error as follows.

[root@ffmpeg gpac]# ./configure
error: zlib not found on system or in local libs

I have installed zlib on custom path /usr/local/myapps. I know the above error occurs when devel package or .h file is not present. Its present on the server.

[root@ffmpeg gpac]# ll /usr/local/myapps/include/zlib.h
-rw-r--r-- 1 root root 79564 Jul  4 02:12 /usr/local/myapps/include/zlib.h
[/code[
I have given environment variables as follows.
LIBS=-L/usr/local/myapps/lib
PKG_CONFIG_PATH=/usr/local/myapps/lib/pkgconfig
LDFLAGS=-L/usr/local/myapps/lib
CPPFLAGS=-I/usr/local/myapps/include
PATH=/usr/local/sbin:/bin:/sbin:/usr/bin:/usr/sbin::/root/bin:/usr/local/myapps/bin

Again .pc file also present.

[root@ffmpeg gpac]# ll /usr/local/myapps/lib/pkgconfig/zlib.pc
-rw-r--r-- 1 root root 265 Jul  4 02:12 /usr/local/myapps/lib/pkgconfig/zlib.pc

How to make the gpac configure script recognize the zlib.h file from the path /usr/local/myapps/include ? I made a symlink to /usr/include/zlib.h and it did not work. Installing zlib-devel via yum solves the problem. But yum installs a differerent zlib version. I need to use custom zlib.

2

where did you define variable of CPPFLAGS ?(In parent shell or in your configure script)

3

Did in both shell and configure script.

configure script snippet

CPPFLAGS=-I/usr/local/myapps/include
CFLAGS=-I/usr/local/myapps/include

cat > $TMPC << EOF
#include <zlib.h>
int main( void ) { if (zlibVersion() != ZLIB_VERSION) { puts("zlib version differs !!!"); return 1; } return 0; }
EOF
has_zlib="no"
if $cc -o $TMPO $TMPC -lz 2> /dev/null  ; then
has_zlib="system"
elif $cc -o $TMPO $TMPC -I$local_inc/zlib -L$local_lib -lz 2> /dev/null  ; then
has_zlib="local"
else
  echo "error: zlib not found on system or in local libs"
  exit 1
fi

error:

[root@ffmpeg gpac]# ./configure
error: zlib not found on system or in local libs
4

firstly , remove the stderr sending null and lets see what happen :wink:
probably , error occurs due to another things,maybe variables (be sure all variables is defined like TMPC,TMPO..)

and you can try with this (more specific)

.......
cat > $TMPC << EOF
#include<stdio.h>
#include <zlib.h>
#include <string.h>
int main( void ) {
static const char* curV = ZLIB_VERSION;
if (zlibVersion()[0] != curV[0]) {
printf("zlib versions has major different using..%s and,currently in system..%s\n" ,zlibVersion(),ZLIB_VERSION);
return 1;}
else if ( strcmp (zlibVersion(),ZLIB_VERSION) != 0 )  {
printf( "you are using %s, cur version %s.\n",zlibVersion(),ZLIB_VERSION);
}
return 0;
}
EOF
....
...

regards
ygemici

5

I removed the stderr and got the following error. I have echoed variables. Let me know if any other variable I should echo. Its not checking the path /usr/local/myapps/include/ where zlib.h is present.

[root@ffmpeg gpac]# ll /usr/local/myapps/include/zlib.h
-rw-r--r-- 1 root root 79564 Jul 4 02:12 /usr/local/myapps/include/zlib.h

[root@ffmpeg gpac]# ./configure
CPPFLAGS  -fno-strict-aliasing
CFLAGS  -fno-strict-aliasing
CFLAGS  -fno-strict-aliasing
cc gcc
TMPC /tmp/gpac-conf-7254-30179-4836.c
TMPO /tmp/gpac-conf-22952-30179-10957.o
local_inc /usr/src/gpac/extra_lib/include
local_lib extra_lib/lib/gcc
CPPFLAGS  -fno-strict-aliasing   --> I set after this to CPPFLAGS to the value below
CPPFLAGS -I/usr/local/myapps/include
/tmp/gpac-conf-7254-30179-4836.c:1:18: error: zlib.h: No such file or directory
/tmp/gpac-conf-7254-30179-4836.c: In function 'main':
/tmp/gpac-conf-7254-30179-4836.c:2: error: 'ZLIB_VERSION' undeclared (first use in this function)
/tmp/gpac-conf-7254-30179-4836.c:2: error: (Each undeclared identifier is reported only once
/tmp/gpac-conf-7254-30179-4836.c:2: error: for each function it appears in.)
error: zlib not found on system or in local libs
6

Please write output of below commands.

# uname -a
# gcc --version  ## ## if you use gcc

and

  • create tmp.c with below contents
#include <zlib.h>
int main( void ) { if (zlibVersion() != ZLIB_VERSION) { puts("zlib version differs !!!"); return 1; } return 0; }

after than can you write below's output

# gcc -v -o tmp.o tmp.c -lz

and this

# gcc -v -o tmp.o tmp.c -lz -I/usr/local/myapps/include
7

Thank you. I get this.

[root@ffmpeg gpac]# gcc -o tmp.o tmp.c -lz -I/usr/local/myapps/include
/usr/bin/ld: cannot find -lz
collect2: ld returned 1 exit status

---------- Post updated at 07:53 PM ---------- Previous update was at 07:36 PM ----------

Fixed. I modified the configure script as follows. Thanks a lot !!

cat > $TMPC << EOF
#include <zlib.h>
int main( void ) { if (zlibVersion() != ZLIB_VERSION) { puts("zlib version differs !!!"); return 1; } return 0; }
EOF
has_zlib="no"
if $cc -o $TMPO $TMPC -lz 2> /dev/null ; then
has_zlib="system"
elif $cc -o $TMPO $TMPC -I$local_inc/zlib -L$local_lib -lz -I/usr/local/myapps/include -L/usr/local/myapps/lib 2> /dev/null  ; then
#elif $cc -o $TMPO $TMPC -I$local_inc/zlib -L$local_lib -lz  2> /dev/null  ; then
has_zlib="local"
else
  echo "error: zlib not found on system or in local libs"
  exit 1
fi

** Detected libraries **
zlib: local
OSS Audio: yes
ALSA Audio: no

---------- Post updated at 08:02 PM ---------- Previous update was at 07:53 PM ----------

make returns this error now

positor/texturing.opic compositor/texturing_gl.opic compositor/visual_manager.opic compositor/visual_manager_2d.opic 
compositor/visual_manager_2d_draw.opic compositor/visual_manager_3d.opic compositor/visual_manager_3d_gl.opic
compositor/x3d_geometry.opic laser/lsr_enc.opic laser/lsr_dec.opic laser/lsr_tables.opic -lm
 -L/usr/local/lib -lGL -lglut -L../extra_lib/lib/gcc  -lz -lpthread -ldl
/usr/bin/ld: cannot find -lz
collect2: ld returned 1 exit status
make[1]: *** [libgpac.so] Error 1
make[1]: Leaving directory `/usr/src/gpac/src'
make: *** [lib] Error 2

---------- Post updated at 08:23 PM ---------- Previous update was at 08:02 PM ----------

SOLVED !!
Use make as follows.

make --environment-overrides -I/usr/local/myapps/include
make  --environment-overrides -I/usr/local/myapps/include install

MP4Box works like a charm

[root@ffmpeg gpac]# /usr/local/myapps/bin/MP4Box -version
MP4Box - GPAC version 0.4.5 (build 33)
GPAC Copyright: (c) Jean Le Feuvre 2000-2005
                (c) ENST 2005-200X
8

congratulations ;):b: