[英]gcc -D option not doing what I thought it would
I'm trying to use AsmJit in a project. 我正在尝试在项目中使用AsmJit。 This is the makefile I was using: 这是我使用的makefile:
CC = g++
CFLAGS = -D ASMJIT_API -I dep/
test: src/main.cpp
$(CC) $(CFLAGS) src/main.cpp -o test.exe
I was getting compiler errors when trying this, so instead I uncommented the line #define ASMJIT_API
from dep/AsmJit/Config.h, and removed the -D switch from the makefile and everything compiled cleanly. 我在尝试这个时遇到编译器错误,所以我从dep / AsmJit / Config.h取消注释#define ASMJIT_API
行,并从makefile中删除了-D开关,干净地编译了所有内容。 I'm using gcc 4.5.3. 我正在使用gcc 4.5.3。 Any ideas? 有任何想法吗?
Thanks. 谢谢。
EDIT: Compiler Errors 编辑:编译器错误
g++ -DASMJIT_API -Idep/ src/main.cpp -o test.exe
In file included from dep/AsmJit/Assembler.h:31:0,
from src/main.cpp:1:
dep/AsmJit/Build.h:274:1: error: expected unqualified-id before numeric constant
In file included from dep/AsmJit/AssemblerX86X64.h:36:0,
from dep/AsmJit/Assembler.h:51,
from src/main.cpp:1:
dep/AsmJit/Defs.h:408:1: error: expected unqualified-id before numeric constant
In file included from dep/AsmJit/DefsX86X64.h:36:0,
from dep/AsmJit/Defs.h:423,
from dep/AsmJit/AssemblerX86X64.h:36,
from dep/AsmJit/Assembler.h:51,
from src/main.cpp:1:
dep/AsmJit/Util.h:412:8: error: expected identifier before numeric constant
dep/AsmJit/Util.h:412:8: error: expected unqualified-id before numeric constant
src/main.cpp:6:1: error: expected ‘}’ at end of input
makefile:5: recipe for target `test' failed
make: *** [test] Error 1
There is a difference between #define ASMJIT_API
and -DASMJIT_API
. #define ASMJIT_API
和-DASMJIT_API
之间存在差异。
The #define
statement defines ASMJIT_API
as nothing, while the -D
flag defines the preprocessor constant as 1
. #define
语句将ASMJIT_API
定义为ASMJIT_API
,而-D
标志将预处理器常量定义为1
。
Using the -D
flag, line 274 of build.h expands to 使用-D
标志,build.h的第274行扩展为
1 void assertionFailure(const char* file, int line, const char* exp);
causing the compiler error. 导致编译器错误。
Don't insert a space between -D and ASMJIT_API. 不要在-D和ASMJIT_API之间插入空格。 Ditto for -I 同上-I
CFLAGS = -DASMJIT_API -Idep/
There you go. 你去吧
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