Hi. I have similar issue to this one #include <SDL2/SDL_image.h> i’m having en error on compilation due to this file trying to include #include "SDL.h":
make
clang -c src/cleanup.c -o obj/cleanup.o -std=c11 -Wall -Wextra -Werror -Wpedantic -Iinc
In file included from src/cleanup.c:1:
In file included from src/../inc/gamelib.h:5:
/nix/store/j9ar69c160x3lbj94nz127l536l9s7h8-SDL2_image-2.8.2/include/SDL2/SDL_image.h:32:10: fatal error: 'SDL.h' file not found
32 | #include "SDL.h"
| ^~~~~~~
1 error generated.
make: *** [Makefile:16: obj/cleanup.o] Error 1
This is shell i’m using:
{ pkgs ? import <nixpkgs> {} }:
with pkgs;
mkShell {
name = "SDL2";
nativeBuildInputs = [
SDL2
SDL2_image
pkg-config
];
shellHook = ''
LD_LIBRARY_PATH=${pkgs.SDL2}/lib
LD_LIBRARY_PATH=${pkgs.SDL2_image}/lib
echo $LD_LIBRARY_PATH
# PKG_CONFIG_PATH=$PKG_CONFIG_PATH${pkgs.SDL2}/lib
# PKG_CONFIG_PATH=$PKG_CONFIG_PATH${pkgs.SDL2_image}/lib
# echo $PKG_CONFIG_PATH
pkg-config --cflags --libs sdl2 SDL2_image
'';
}
Thank you all
my Makefile
CC = clang
FLAGS = -std=c11 -Wall -Wextra -Werror -Wpedantic
SDL_FLAGS = $(pkg-config --cflags --libs sdl2 SDL2_image)
NAME = endgame
SRC = $(wildcard ./src/*.c)
OBJ = $(patsubst ./src/%.c, ./obj/%.o, $(SRC))
all: $(NAME)
$(NAME): $(OBJ)
$(CC) -o $(NAME) $(OBJ) $(FLAGS) $(SDL_FLAGS) -Iinc -Linc
./obj/%.o: ./src/%.c
@mkdir -p ./obj
$(CC) -c $< -o $@ $(FLAGS) $(SDL_FLAGS) -Iinc
clean:
@rm -rf ./obj/ $(NAME)
uninstall: clean
reinstall: uninstall all
trofi
February 11, 2025, 9:29am
3
Note how $(SDL_FLAGS) expanded to an empty list here.
GNU Make syntax for running external shell commands to store the result output in a variable should be (untested) SDL_FLAGS = $(shell pkg-config --cflags --libs sdl2 SDL2_image) instead of SDL_FLAGS = $(pkg-config --cflags --libs sdl2 SDL2_image).
1 Like
Thank you for your suggestion, this is reasonable indeed, but even with shell keyword the issue persists.
SDL_FLAGS = $(shell pkg-config --cflags --libs sdl2 SDL2_image)
all: $(NAME)
$(NAME): $(OBJ)
@ar rcs $(NAME).a $(OBJ);
$(CC) $(FLAGS) -o $(NAME) $(SDL_FLAGS) -lSDL2 -lSDL2_image -I inc src/$(NAME).c $(NAME).a
trofi
February 11, 2025, 9:49am
5
Can you create a minimal complete repository that fails to build? It might be easier to craft a patch against it to illustrate the fix.
1 Like
Yep, i can do it:
{ pkgs ? import <nixpkgs> {} }:
with pkgs;
mkShell {
name = "SDL2";
nativeBuildInputs = [
SDL2
SDL2_image
pkg-config
];
shellHook = ''
LD_LIBRARY_PATH=${pkgs.SDL2}/lib
LD_LIBRARY_PATH=${pkgs.SDL2_image}/lib
echo $LD_LIBRARY_PATH
# PKG_CONFIG_PATH=$PKG_CONFIG_PATH${pkgs.SDL2}/lib
# PKG_CONFIG_PATH=$PKG_CONFIG_PATH${pkgs.SDL2_image}/lib
# echo $PKG_CONFIG_PATH
pkg-config --cflags --libs sdl2 SDL2_image
'';
}
main:
#include <SDL2/SDL_surface.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>
int main(void) {
SDL_Surface *surface = IMG_Load("bee.png");
SDL_FreeSurface(surface);
}
Compile withclang ./*.c -lSDL2 -lSDL2_image
Also, this article is relative.
trofi
February 11, 2025, 10:25am
8
To be able to compile your project (on linux) I had to move the main.c to src/ directory and use make to build it. It built just fine:
$ make
gcc -c src/main.c -o obj/main.o -D_REENTRANT -I/nix/store/25i5c4qivpfiqrxy239lsmdqm0pirwrl-SDL2-2.30.11-dev/include -I/nix/store/25i5c4qivpfiqrxy239lsmdqm0pirwrl-SDL2-2.30.11-dev/include/SDL2 -I/nix/store/f4i4k26rl4qyxh18r9vajp0ab09vzvbq-SDL2_image-2.8.4/include/SDL2 -L/nix/store/y0vi3axnpydl85krg5z3202fc9nww60z-SDL2-2.30.11/lib -L/nix/store/f4i4k26rl4qyxh18r9vajp0ab09vzvbq-SDL2_image-2.8.4/lib -lSDL2_image -Wl,-rpath,/nix/store/y0vi3axnpydl85krg5z3202fc9nww60z-SDL2-2.30.11/lib -Wl,--enable-new-dtags -lSDL2 -Iinc
gcc -o endgame ./obj/main.o -D_REENTRANT -I/nix/store/25i5c4qivpfiqrxy239lsmdqm0pirwrl-SDL2-2.30.11-dev/include -I/nix/store/25i5c4qivpfiqrxy239lsmdqm0pirwrl-SDL2-2.30.11-dev/include/SDL2 -I/nix/store/f4i4k26rl4qyxh18r9vajp0ab09vzvbq-SDL2_image-2.8.4/include/SDL2 -L/nix/store/y0vi3axnpydl85krg5z3202fc9nww60z-SDL2-2.30.11/lib -L/nix/store/f4i4k26rl4qyxh18r9vajp0ab09vzvbq-SDL2_image-2.8.4/lib -lSDL2_image -Wl,-rpath,/nix/store/y0vi3axnpydl85krg5z3202fc9nww60z-SDL2-2.30.11/lib -Wl,--enable-new-dtags -lSDL2 -Iinc -Linc
$ ls
endgame Makefile obj shell.nix src
If you run clang command directly you need to add a $(pkg-config --cflags --libs sdl2 SDL2_image) parameter to it as well.
1 Like
Can you share your Makefile, please?
trofi
February 11, 2025, 10:56am
10
Full archive (828 bytes): https://slyfox.uni.cx/d/60116/a.tar.xz
Running:
$ wget 'https://slyfox.uni.cx/d/60116/a.tar.xz'
$ tar xf a.tar.xz
$ nix-shell --pure
/nix/store/f4i4k26rl4qyxh18r9vajp0ab09vzvbq-SDL2_image-2.8.4/lib
-D_REENTRANT -I/nix/store/25i5c4qivpfiqrxy239lsmdqm0pirwrl-SDL2-2.30.11-dev/include -I/nix/store/25i5c4qivpfiqrxy239lsmdqm0pirwrl-SDL2-2.30.11-dev/include/SDL2 -I/nix/store/f4i4k26rl4qyxh18r9vajp0ab09vzvbq-SDL2_image-2.8.4/include/SDL2 -L/nix/store/y0vi3axnpydl85krg5z3202fc9nww60z-SDL2-2.30.11/lib -L/nix/store/f4i4k26rl4qyxh18r9vajp0ab09vzvbq-SDL2_image-2.8.4/lib -lSDL2_image -Wl,-rpath,/nix/store/y0vi3axnpydl85krg5z3202fc9nww60z-SDL2-2.30.11/lib -Wl,--enable-new-dtags -lSDL2
$$ make
gcc -c src/main.c -o obj/main.o -D_REENTRANT -I/nix/store/25i5c4qivpfiqrxy239lsmdqm0pirwrl-SDL2-2.30.11-dev/include -I/nix/store/25i5c4qivpfiqrxy239lsmdqm0pirwrl-SDL2-2.30.11-dev/include/SDL2 -I/nix/store/f4i4k26rl4qyxh18r9vajp0ab09vzvbq-SDL2_image-2.8.4/include/SDL2 -L/nix/store/y0vi3axnpydl85krg5z3202fc9nww60z-SDL2-2.30.11/lib -L/nix/store/f4i4k26rl4qyxh18r9vajp0ab09vzvbq-SDL2_image-2.8.4/lib -lSDL2_image -Wl,-rpath,/nix/store/y0vi3axnpydl85krg5z3202fc9nww60z-SDL2-2.30.11/lib -Wl,--enable-new-dtags -lSDL2 -Iinc
gcc -o endgame ./obj/main.o -D_REENTRANT -I/nix/store/25i5c4qivpfiqrxy239lsmdqm0pirwrl-SDL2-2.30.11-dev/include -I/nix/store/25i5c4qivpfiqrxy239lsmdqm0pirwrl-SDL2-2.30.11-dev/include/SDL2 -I/nix/store/f4i4k26rl4qyxh18r9vajp0ab09vzvbq-SDL2_image-2.8.4/include/SDL2 -L/nix/store/y0vi3axnpydl85krg5z3202fc9nww60z-SDL2-2.30.11/lib -L/nix/store/f4i4k26rl4qyxh18r9vajp0ab09vzvbq-SDL2_image-2.8.4/lib -lSDL2_image -Wl,-rpath,/nix/store/y0vi3axnpydl85krg5z3202fc9nww60z-SDL2-2.30.11/lib -Wl,--enable-new-dtags -lSDL2 -Iinc -Linc
$ ls
Makefile a.tar.xz endgame obj shell.nix src
1 Like
Thank you.
1 Like
Hi, the problem has been solved.
{ pkgs ? import <nixpkgs> {} }:
with pkgs;
mkShell {
name = "SDL2";
nativeBuildInputs = [
SDL2
SDL2_image
pkg-config
];
shellHook = ''
export LD_LIBRARY_PATH=${pkgs.SDL2}/lib:${pkgs.SDL2_image}/lib:$LD_LIBRARY_PATH
export PKG_CONFIG_PATH=${pkgs.SDL2}/lib/pkgconfig:${pkgs.SDL2_image}/lib/pkgconfig:$PKG_CONFIG_PATH
pkg-config --cflags --libs sdl2 SDL2_image
'';
}
Fixed Makefile:
CC = clang
FLAGS = -std=c11 -Wall -Wextra -Werror -Wpedantic
CFLAGS := $(CFLAGS) `pkg-config --cflags sdl2 SDL2_image`
LDFLAGS := $(LDFLAGS) `pkg-config --libs sdl2 SDL2_image`
NAME = endgame
SRC = $(wildcard ./src/*.c)
OBJ = $(patsubst ./src/%.c, ./obj/%.o, $(SRC))
all: $(NAME)
$(NAME): $(OBJ)
@ar rcs $(NAME).a $(OBJ);
@$(CC) -o $(NAME) $(OBJ) $(FLAGS) $(LDFLAGS) -Iinc -Linc -lm $(NAME).a
./obj/%.o: ./src/%.c
@mkdir -p ./obj
@$(CC) -c $< -o $@ $(FLAGS) $(CFLAGS) -Iinc
clean:
@rm -rf ./obj/*
uninstall: clean
@rm -f $(NAME)
@rm -f $(NAME).a
@rm -rf ./obj/
reinstall: uninstall all
Big thanks @trofi
1 Like
