Basic project structure

.gitignore

@@ -0,0 +1,5 @@
+/build/
+/docman
+/perf.data*
+/massif.out*
+/*~

.gitmodules

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+[submodule "IUP_Nix"]
+	path = IUP_Nix
+	url = ssh://gitea@git.cfpi-fpsi.eu:1337/emil/IUP_Nix.git

Makefile

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+SRC_DIR         := src
+BUILD_DIR       := build
+
+SRC             := $(shell find $(SRC_DIR) -name '*.c')
+
+OBJ             := $(SRC:$(SRC_DIR)/%.c=$(BUILD_DIR)/%.o)
+DEP             := $(OBJ:.o=.d)
+
+LC_ALL          := C
+CC              ?= gcc
+LD              := $(CC)
+PKG_CONFIG      ?= pkg-config
+CCACHE          ?= ccache
+RM              ?= rm -f
+STD             := gnu23
+
+DEBUG           ?= 1
+STATIC          ?= 0
+PKGS            := iup
+TOOLS           := $(CC) $(LD) $(PKG_CONFIG) $(CCACHE)
+
+CPPFLAGS         = -I$(SRC_DIR) $(shell $(PKG_CONFIG) --cflags $(PKGS) 2>/dev/null)
+CFLAGS          := -std=$(STD) -Werror -Wextra -Wall -MMD -MP
+LDLIBS           = $(shell $(PKG_CONFIG) --libs $(PKGS) 2>/dev/null)
+LDFLAGS         ?=
+
+TARGET          := docman
+
+ifeq ($(STATIC),1)
+	LDFLAGS += -static
+	LDLIBS   = $(shell $(PKG_CONFIG) --static --libs $(PKGS) 2>/dev/null || $(PKG_CONFIG) --libs $(PKGS) 2>/dev/null)
+else
+	LDLIBS   = $(shell $(PKG_CONFIG) --libs $(PKGS) 2>/dev/null)
+endif
+
+ifeq ($(DEBUG),1)
+	CFLAGS  += -g -DDEBUG
+	LDFLAGS   += -g
+else
+	CFLAGS  += -O2 -DNDEBUG
+endif
+
+.DELETE_ON_ERROR:
+.PHONY: all check-tools check-libs clean format
+all: $(TARGET)
+
+$(OBJ): | check-libs
+
+$(TARGET): $(OBJ)
+	$(LD) $^ -o $@ $(LDFLAGS) $(LDLIBS)
+
+$(BUILD_DIR)/%.o: $(SRC_DIR)/%.c
+	mkdir -p $(dir $@)
+	$(CCACHE) $(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@
+
+check-tools:
+	@for t in $(TOOLS); do \
+		if path=$$(command -v $$t); then \
+			printf "Found tool: %-12s %s\n" "$$t" "$$path"; \
+		else \
+			printf "Error: missing tool %-12s\n" "$$t"; \
+			exit 1; \
+		fi; \
+	done
+	@echo "All required tools found"
+
+check-libs: check-tools
+	@for lib in $(PKGS); do \
+		if $(PKG_CONFIG) --exists $$lib; then \
+			ver=$$($(PKG_CONFIG) --modversion $$lib); \
+			printf "Found library: %-12s %s\n" "$$lib" "$$ver"; \
+		else \
+			printf "Error: library  %-12s not found\n" "$$lib"; \
+			exit 1; \
+		fi; \
+	done
+	@echo "All required libraries found. Building"
+
+clean:
+	$(RM) -r $(BUILD_DIR) $(TARGET) perf.data* massif.out*
+
+format:
+	@if command -v indent >/dev/null 2>&1; then \
+		find $(SRC_DIR) -type f \( -name '*.c' -o -name '*.h' \) \
+			-exec sh -c 'tmp=$$(mktemp) || tmp=/tmp/indent.$$$$; \
+					indent -gnu "$$1" -o "$$tmp" && mv "$$tmp" "$$1"' _ {} \; ; \
+	else \
+		printf "GNU indent missing, cannot format code\n"; \
+		exit 1; \
+	fi
+
+
+-include $(DEP)
+

README.md

@@ -1,3 +0,0 @@
-# DocMan
-
-A document and book management system, similar to Calibre.

README.org

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+#+TITLE: DocMan
+
+A document and book management system, similar to Calibre.

shell.nix

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+let
+  pkgs = import (fetchTarball "https://github.com/NixOS/nixpkgs/tarball/nixos-25.11") {};
+  ftgl-tecgraf = pkgs.callPackage ./IUP_Nix/ftgl-tecgraf.nix {};
+  im = pkgs.callPackage ./IUP_Nix/im.nix { inherit builtins; };
+  cd = pkgs.callPackage ./IUP_Nix/cd.nix { inherit builtins ftgl-tecgraf im; };
+  iup = pkgs.callPackage ./IUP_Nix/iup.nix { inherit builtins ftgl-tecgraf im cd; };
+in
+pkgs.mkShellNoCC {
+  packages = with pkgs; [
+    iup
+    fftw
+    libpng
+    gtk2
+    libGLU
+    ftgl-tecgraf
+    
+    gcc
+    ccache
+    pkg-config
+    cloc
+    valgrind
+    gdb
+    cpulimit
+    perf
+    indent
+  ];
+}

src/Makefile

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+# This Makefile is just for the convenience of being able to make
+# while having the shell be in src/
+
+.PHONY: FORCE
+
+FORCE:
+	$(MAKE) -C .. $(MAKECMDGOALS)

src/main.c

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+#include <iup.h>
+#include <stddef.h>
+
+int
+main (int argc, char **argv)
+{
+  IupOpen (&argc, &argv);
+
+  Ihandle *dlg = IupDialog (NULL);
+  IupSetAttribute (dlg, "TITLE", "DocMan");
+
+  IupShowXY (dlg, IUP_CENTER, IUP_CENTER);
+  IupMainLoop ();
+  IupClose ();
+  
+  return 0;
+}