为什么 GCC 在 includes 文件夹中找不到头文件？

Question

我正在尝试使用此生成文件 ~

使用 #include <glad/glad.h> 在我的 main.cpp 中包含 glad.h

CC      := g++
CFLAGS  := -std=c++17 -Wall -Wextra -g

BIN     := bin
SRC     := src
INCLUDE := include
LIB     := lib

LIBRARIES   := -lglad -lglfw3dll

ifeq ($(OS),Windows_NT)
EXECUTABLE  := main.exe
SOURCEDIRS  := $(SRC)
INCLUDEDIRS := $(INCLUDE)
LIBDIRS     := $(LIB)
else
EXECUTABLE  := main
SOURCEDIRS  := $(shell find $(SRC) -type d)
INCLUDEDIRS := $(shell find $(INCLUDE) -type d)
LIBDIRS     := $(shell find $(LIB) -type d)
endif

CINCLUDES   := $(patsubst %,-I%, $(INCLUDEDIRS:%/=%))
CLIBS       := $(patsubst %,-L%, $(LIBDIRS:%/=%))

SOURCES     := $(wildcard $(patsubst %,%/*.cpp, $(SOURCEDIRS)))
OBJECTS     := $(SOURCES:.cpp=.o)

all: $(BIN)/$(EXECUTABLE)

.PHONY: clean
clean:
    -$(RM) $(BIN)/$(EXECUTABLE)
    -$(RM) $(OBJECTS)


run: all
    ./$(BIN)/$(EXECUTABLE)

$(BIN)/$(EXECUTABLE): $(OBJECTS)
    $(CC) $(CFLAGS) $(CINCLUDES) $(CLIBS) $^ -o $@ $(LIBRARIES)

但是每次我收到这个错误...

g++    -c -o src/main.o src/main.cpp
src/main.cpp:1:10: fatal error: glad/glad.h: No such file or directory
 #include <glad/glad.h>
          ^~~~~~~~~~~~~
compilation terminated.
mingw32-make: *** [<builtin>: src/main.o] Error 1

每个头文件都存在于 include 文件夹中，但它仍然无法正常工作。请帮忙... 如何解决这个问题如果 make 文件中有任何其他类型的错误，请指出... 谢谢。

Answer 1

问题是 make 正在调用内置规则将您的源文件编译为目标文件，但该规则对您的 CINCLUDES 或其他变量一无所知。从 documentation...

Compiling C++ programs

n.o is made automatically from n.cc, n.cpp, or n.C with a recipe of the form ‘$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c’.

最简单的解决方案是将 $(CINCLUDES) 添加到 $(CPPFLAGS)

CPPFLAGS += $(CINCLUDES)

为什么 GCC 在 includes 文件夹中找不到头文件？

Why GCC can not find the header files in includes folder?

c++

opengl

makefile

linker-errors