Question

gcc 4.4.2

I have installed apache runtime portable. apr-1.3.9

./configure
make
make test
make install

Everything installed fine.

I have in my /usr/local/apr/lib all the libraries and the includes in the following /usr/local/apr/include/apr-1

I have a simple main.c program to test:

#include <stdio.h>
#include <apr.h>

int main(void)
{
    printf(" == Start of program ==\n");

    return 0;
}

And my makefile:

OBJECT_FILES = main.o

CC = gcc
CFLAGS = -Wall -g -D_LARGEFILE64_SOURCE

LIBS_PATH = -L/usr/local/apr/lib
INC_PATH = -I/usr/local/apr/include/apr-1

LIBS = -lapr-1

test_apr: $(OBJECT_FILES)
    $(CC) $(CFLAGS) $(OBJECT_FILES) $(LIBS_PATH) $(INC_PATH) $(LIBS) -o test_apr

main.o: main.c
    $(CC) -c $(CFLAGS) $(INC_PATH) $(LIBS_PATH) $(INC_PATH) main.c  

However, when I try and compile I get the following error:

gcc -c -I/usr/local/apr/include/apr-1 -L/usr/local/apr/lib -I/usr/local/apr/include/apr-1 main.c    
In file included from main.c:3:
/usr/local/apr/include/apr-1/apr.h:285: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘apr_off_t’
make: *** [main.o] Error 1
make: Target `test_apr' not remade because of errors.

However, I don’t understand this as the header file is called apr.h in the apr-1 folder and the libary I am linking with is called libapr-1.so

I know my paths are correct I have double check them. So can’t understand why I can’t link them.

Many thanks for any advice,

Answer 1

My crystal ball tells me that you need to run add -D_LARGEFILE64_SOURCE to CFLAGS, or if you’re on linux: the command getconf LFS_CFLAGS gives you an exact list of CFLAGS to add to your existing CFLAGS for large file support.

Finally, you should actually use apr-1-config --cflags to get a list of compiler flags if possible.