[Scons-users] Small troubles while trying simple scons build for my project

[William Blevins]

Steven,

It appears that the program "TestError" needs to be linked against the
library "error". You forgot to set the linking flags LIBS and/or LIBPATH.

http://scons.org/doc/production/HTML/scons-user.html#idp1396575996

V/R,
William

On Sat, Sep 17, 2016 at 10:10 PM, Steven Truppe <steven.truppe at chello.at>
wrote:

>
>
> On 2016-09-18 03:52, Steven Truppe wrote:
>
>
> On 2016-09-18 03:32, Steven Truppe wrote:
>
> Hi everyone, i've a small question and i solved it before but then stuck
> again: here is my file structure:
>
> /bin
> /docs
> /src
> /src/MainApp.c
> /intern
> /intern/Error/Error.h
> /intern/Error/Error.c
> /intern/Error/TestError.c
> /intern/Error/SConscript
> SConstruct
>
> It should be a very simple setup to create my build system for a larger
> project i'm working on.
>
> the SConstruct file looks like this:
>
>
> import os
> env = Environment(
>  ENV = os.environ,
>  CPPPATH = "intern/"
> )
> Export("env")
> env.SConscript(r'intern/Error/SConscript', variant_dir=r'#build/Error/',
> duplicate=0)
>
>
> And the SConscript file looks like:
>
> Import("env")
> env.Library("error", "Error.c")
> env.Program("TestError", ["TestError.c"])
>
>
>
> Error.h:
>
> #ifndef ERROR_HEADER
> #define ERROR_HEADER
>
>
> void err_hello(void);
> void err_message(char *message);
>
>
> #endif
>
>
> Error.c:
>
> #include "Error.h"
>
> #include <stdio.h>
>
>
> void err_hello(){
>     printf("HEllO");
> }
>
> void err_message(char *message) {
>     printf("Error: '%s' in file %i on line %i in file %s", &message,
> __LINE__, __FILE__, __func__);
>
>
> And finaly the TestError.c file:
>
> #include "Error.h"
>
> int main(int argc, char **argv) {
>     err_hello();
>     err_message("This is an error message");
>
>     return(0);
> }
>
>
>
>
>
>
> So far so good, now my problem is that i get this error message when i try
> to compile:
>
>
> gcc -o build/Error/Error.o -c -Ibuild/Error/intern -Iintern/Error/intern
> intern/Error/Error.c
> gcc -o build/Error/TestError.o -c -Ibuild/Error/intern
> -Iintern/Error/intern intern/Error/TestError.c
> gcc -o build/Error/TestError build/Error/TestError.o
> build/Error/TestError.o: In function `main':
> TestError.c:(.text+0x10): undefined reference to `err_hello'
> TestError.c:(.text+0x1a): undefined reference to `err_message'
> collect2: error: ld returned 1 exit status
> scons: *** [build/Error/TestError] Error 1
>
> I had the same issue when used a .cpp file in my project but that's now
> only c so i have no clue... can someone look at the code and help me a
> bit out here, it would would be a great help!
>
>
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