msvc c++ build failing to compile

[Skytrias]

hey ive been looking into ui's and your library looks pretty nice. However im getting weird link errors and error: LNK2019 unresolved symbol ""void __cdecl mu_init(struct mu_Context *)" or when i inserted extern "C" myself in your files i got it to "mu_init" being unresolved.

my build.bat uses these libs gdi32.lib opengl32.lib winmm.lib

just wondering if anyone usese windows with msvc c++ here and got this figured out

[AregevDev]

Have the same issue, not sure how to fix it...

[inkydragon]

1. initial empty vs2019 project
2. set /SUBSYSTEM:WINDOWS flag
3. add _CRT_SECURE_NO_WARNINGS flag
4. put everything in the root folder of your project, or you may Configure Include Directories to include src and demo folder.
5. use NuGet add SDL2 ~~and nupengl.core~~ (windows already has opengl) Or you may add those dependences by hand like: How do I link SDL with Visual Studio 2019 - Stack Overflow
6. change include: In main.c: #include <SDL2/SDL.h> => #include "SDL.h" In renderer.c:
   • #include <SDL2/SDL.h> => #include "SDL.h";
   • #include <SDL2/SDL_opengl.h> => #include "SDL_opengl.h"
7. add opengl32.lib to Additional Dependencies
8. build and run!

[gvanem]

just wondering if anyone usese windows with msvc c++ here and got this figured out

You probably compiled your project as C++. Look, there's no:

#ifdef __cplusplus
extern "C" {
#endif

inside microui.h

[immortalx74]

I tried @inkydragon 's suggestion but no luck. I'm not using VS, just invoking the compiler from a developer command prompt. Any ideas?

[gvanem]

Your project is C++, right? Apply this simple patch:

--- a/src/microui.h 2021-10-09 12:10:12
+++ b/src/microui.h 2021-10-09 12:14:10
@@ -8,6 +8,10 @@
 #ifndef MICROUI_H
 #define MICROUI_H

+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define MU_VERSION "2.01"

 #define MU_COMMANDLIST_SIZE     (256 * 1024)
@@ -293,4 +297,8 @@
 void mu_begin_panel_ex(mu_Context *ctx, const char *name, int opt);
 void mu_end_panel(mu_Context *ctx);

+#ifdef __cplusplus
+};
+#endif
+
 #endif

[immortalx74]

@gvanem I don't have a "project" as I'm not actually using Visual Studio. I invoke the compiler from the command line, and the default behavior with .c extensions is to compile as C. Even if I force C compilation with /Tc or /TC compiler flags, I always get the error:

LINK : fatal error LNK1561: entry point must be defined

I also tried with your fix and forcing C++ compilation, in which case I get several C4576 errors.

[g012]

You don’t have a main / winmain function.

Le sam. 9 oct. 2021 à 16:54, immortalx74 @.***> a écrit :

@gvanem https://github.com/gvanem I don't have a "project" as I'm not actually using Visual Studio. I invoke the compiler from the command line, and the default behavior with .c extensions is to compile as C. Even if I force C compilation with /Tc or /TC compiler flags, I always get the error:

LINK : fatal error LNK1561: entry point must be defined

I also tried with your fix and forcing C++ compilation, in which case I get several C4576 errors.

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[immortalx74]

Problem fixed. I was only compiling main.c and microui.c. I assumed that renderer.c was included in main.c