MinGW does not see the library

MinGW does not see the library

Alexander Zhirov

Member #17,695

May 2020

I am trying to configure compilation of a project in NetBeans.
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I downloaded the latest version of the library assembly from GitHub. Unpacked to the root of the system directory.
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In NetBeans indicated the path to store the "include, bin, lib" directory.
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When writing code, the IDE pulls up the necessary headers and the code looks correct, without errors. When compiling, in the project properties specified the necessary keys: -lallegro_dialog -lallegro_primitives -lallegro
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But for some reason, when compiling libraries are not pulled and Netbeans throws errors.
full image
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#SelectExpand
  1cd 'C:\AllegroTest'
  2C:\MinGW\msys\1.0\bin\make.exe -f Makefile CONF=Debug
  3"/C/MinGW/msys/1.0/bin/make.exe" -f nbproject/Makefile-Debug.mk QMAKE= SUBPROJECTS= .build-conf
  4make.exe[1]: Entering directory `/c/AllegroTest'
  5"/C/MinGW/msys/1.0/bin/make.exe"  -f nbproject/Makefile-Debug.mk dist/Debug/MinGW-Windows/allegrotest.exe
  6make.exe[2]: Entering directory `/c/AllegroTest'
  7mkdir -p dist/Debug/MinGW-Windows
  8gcc -lallegro_dialog -lallegro_primitives -lallegro    -o dist/Debug/MinGW-Windows/allegrotest build/Debug/MinGW-Windows/main.o 
  9c:/mingw/bin/../lib/gcc/mingw32/6.3.0/../../../../mingw32/bin/ld.exe: cannot find -lallegro_dialog
 10c:/mingw/bin/../lib/gcc/mingw32/6.3.0/../../../../mingw32/bin/ld.exe: cannot find -lallegro_primitives
 11c:/mingw/bin/../lib/gcc/mingw32/6.3.0/../../../../mingw32/bin/ld.exe: cannot find -lallegro
 12collect2.exe: error: ld returned 1 exit status
 13make.exe[2]: *** [dist/Debug/MinGW-Windows/allegrotest.exe] Error 1
 14make.exe[2]: Leaving directory `/c/AllegroTest'
 15make.exe[1]: *** [.build-conf] Error 2
 16make.exe[1]: Leaving directory `/c/AllegroTest'
 17make.exe": *** [.build-impl] Error 2
 18
 19СОБРАТЬ FAILED (значение выхода 2,, общее время: 940ms)

If i don't use keys -lallegro_dialog -lallegro_primitives -lallegro then

#SelectExpand
  1cd 'C:\AllegroTest'
  2C:\MinGW\msys\1.0\bin\make.exe -f Makefile CONF=Debug
  3"/C/MinGW/msys/1.0/bin/make.exe" -f nbproject/Makefile-Debug.mk QMAKE= SUBPROJECTS= .build-conf
  4make.exe[1]: Entering directory `/c/AllegroTest'
  5"/C/MinGW/msys/1.0/bin/make.exe"  -f nbproject/Makefile-Debug.mk dist/Debug/MinGW-Windows/allegrotest.exe
  6make.exe[2]: Entering directory `/c/AllegroTest'
  7mkdir -p dist/Debug/MinGW-Windows
  8gcc     -o dist/Debug/MinGW-Windows/allegrotest build/Debug/MinGW-Windows/main.o 
  9build/Debug/MinGW-Windows/main.o: In function `main':
 10C:\Users\Администратор\Documents\NetBeansProjects\AllegroTest/main.c:23: undefined reference to `al_install_system'
 11C:\Users\\Documents\NetBeansProjects\AllegroTest/main.c:25: undefined reference to `al_show_native_message_box'
 12C:\Users\Администратор\Documents\NetBeansProjects\AllegroTest/main.c:30: undefined reference to `al_create_display'
 13C:\Users\\Documents\NetBeansProjects\AllegroTest/main.c:34: undefined reference to `al_show_native_message_box'
 14C:\Users\Администратор\Documents\NetBeansProjects\AllegroTest/main.c:39: undefined reference to `al_init_primitives_addon'
 15C:\Users\\Documents\NetBeansProjects\AllegroTest/main.c:40: undefined reference to `al_install_keyboard'
 16C:\Users\Администратор\Documents\NetBeansProjects\AllegroTest/main.c:42: undefined reference to `al_create_event_queue'
 17C:\Users\\Documents\NetBeansProjects\AllegroTest/main.c:46: undefined reference to `al_show_native_message_box'
 18C:\Users\Администратор\Documents\NetBeansProjects\AllegroTest/main.c:51: undefined reference to `al_get_keyboard_event_source'
 19C:\Users\\Documents\NetBeansProjects\AllegroTest/main.c:51: undefined reference to `al_register_event_source'
 20C:\Users\Администратор\Documents\NetBeansProjects\AllegroTest/main.c:52: undefined reference to `al_get_display_event_source'
 21C:\Users\\Documents\NetBeansProjects\AllegroTest/main.c:52: undefined reference to `al_register_event_source'
 22C:\Users\Администратор\Documents\NetBeansProjects\AllegroTest/main.c:57: undefined reference to `al_wait_for_event'
 23C:\Users\\Documents\NetBeansProjects\AllegroTest/main.c:109: undefined reference to `al_map_rgb'
 24C:\Users\Администратор\Documents\NetBeansProjects\AllegroTest/main.c:109: undefined reference to `al_draw_filled_rectangle'
 25C:\Users\\Documents\NetBeansProjects\AllegroTest/main.c:110: undefined reference to `al_flip_display'
 26C:\Users\Администратор\Documents\NetBeansProjects\AllegroTest/main.c:111: undefined reference to `al_map_rgb'
 27C:\Users\\Documents\NetBeansProjects\AllegroTest/main.c:111: undefined reference to `al_clear_to_color'
 28C:\Users\Администратор\Documents\NetBeansProjects\AllegroTest/main.c:114: undefined reference to `al_destroy_display'
 29collect2.exe: error: ld returned 1 exit status
 30make.exe[2]: *** [dist/Debug/MinGW-Windows/allegrotest.exe] Error 1
 31make.exe[2]: Leaving directory `/c/AllegroTest'
 32make.exe[1]: *** [.build-conf] Error 2
 33make.exe[1]: Leaving directory `/c/AllegroTest'
 34make.exe": *** [.build-impl] Error 2
 35
 36СОБРАТЬ FAILED (значение выхода 2,, общее время: 1s)

I have already copied bin to MinGW itself, but this did not work. I ask for help.:(
Screencast

Peter Hull

Member #1,136

March 2001

It is finding the headers OK (otherwise you would get compile errors when compiling .c to .o) but not the libraries.
Usually either the libs are in the compiler's standard locations, or the command line would mention them specifically, for example:

gcc -Lpath/to/allegro/libraries -lallegro_dialog -lallegro_primitives -lallegro    -o dist/Debug/MinGW-Windows/allegrotest build/Debug/MinGW-Windows/main.o

Can you show us what nbproject/Makefile-Debug.mk looks like?

Also: the directory you put a red box around looks to be a 64-bit one, but your compiler is mingw32. Are you trying to link a 32-bit program with 64 bit libraries?
Edgar is the expert on this stuff (if I was working in Windows I'd use VS and the NuGet packages rather than MinGW)

Edgar Reynaldo

Major Reynaldo

May 2007

One problem is link order. You have to link after you compile your main .o file.

Alexander Zhirov said:

gcc -lallegro_dialog -lallegro_primitives -lallegro -o dist/Debug/MinGW-Windows/allegrotest build/Debug/MinGW-Windows/main.o

-l goes after main.o in this case

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