从源代码编译FreeImage。 #include FreeImage.h未找到

Question

I have compiled FreeImage 3.10.0 from source at /lib/FreeImage on Mac OS X 10.6.

I can see that after compilation these files were copied:

/usr/local/lib/libfreeimage-3.10.0.dylib
/usr/local/lib/libfreeimage.a
/usr/local/include/FreeImage.h

CMake cannot find FreeImage, but I cannot even do

#include <FreeImage.h>  // not found

I am assuming I need to add FreeImage.h to the Mac OS X environment path, except I don't know which path is the right one as there are a few different files which store environment path variables.

What do I need to do to get FreeImage header to be found by my C++ app or CMake?

Here is the first part of my Makefile.osx is this helps:

# -*- Makefile -*-
# Mac OSX makefile for FreeImage

# This file can be generated by ./gensrclist.sh
include Makefile.srcs

# General configuration variables:
CC_PPC = gcc-4.0
CC_I386 = gcc-4.0
CPP_PPC = g++-4.0
CPP_I386 = g++-4.0
COMPILERFLAGS = -Os -fexceptions -fvisibility=hidden
COMPILERFLAGS_PPC = -arch ppc
COMPILERFLAGS_I386 = -arch i386
COMPILERPPFLAGS = -Wno-ctor-dtor-privacy
INCLUDE += 
INCLUDE_PPC = -isysroot /Developer/SDKs/MacOSX10.6.sdk
INCLUDE_I386 = -isysroot /Developer/SDKs/MacOSX10.6.sdk
CFLAGS_PPC = $(COMPILERFLAGS) $(COMPILERFLAGS_PPC) $(INCLUDE) $(INCLUDE_PPC)
CFLAGS_I386 = $(COMPILERFLAGS) $(COMPILERFLAGS_I386) $(INCLUDE) $(INCLUDE_I386)
CPPFLAGS_PPC = $(COMPILERPPFLAGS) $(CFLAGS_PPC)
CPPFLAGS_I386 = $(COMPILERPPFLAGS) $(CFLAGS_I386)
LIBRARIES_PPC = -Wl,-syslibroot /Developer/SDKs/MacOSX10.6.sdk
LIBRARIES_I386 = -Wl,-syslibroot /Developer/SDKs/MacOSX10.6.sdk
LIBTOOL = libtool
LIPO = lipo

Update: I added these lines into my Makefile as per Nicholas' instructions, then rebuilt but this didn't work:

CFLAGS = -I/usr/local/include
LDFLAGS = -L/usr/local/lib

Answer 1

编译时，必须将-I / usr / local / include添加到CFLAGS，将-L / usr / local / lib添加到LDFLAGS。

Answer 2

Compiling with gcc -c file.c -o file.o -I /usr/local/include should compile your file that refers FreeImage.h.

However, when using isysroot everything becomes relative to the system root (ie your refrence to /usr/local/include is in fact isysroot /usr/local/include). "gcc -v" will show everything that goes on, making things easy:

tmp diciu$ gcc -v -isysroot /Developer/SDKs/MacOSX10.6.sdk test.c
[..]
ignoring nonexistent directory "/Developer/SDKs/MacOSX10.6.sdk/usr/local/include"

Answer 3

The ' INCLUDE += ' line looks like the one to attack:

INCLUDE += -I/usr/local/include

If the library is missing too, then you will need to find another line to add ' -L/usr/include/lib ' to.