'INTMAX_MAX'未在此范围内声明 [英] ‘INTMAX_MAX’ was not declared in this scope
问题描述
当编译一个简单的代码片段时: test.cpp
:
#include< stdint.h>
#include< stdio.h>
int main()
{
intmax_t max = INTMAX_MAX;
printf(%jd,max);
返回0;
}
我得到这个错误:
[huqiu @ 101〜] $ g ++ -o test.o test.cpp
test.cpp:函数'int main()':
test.cpp:5:错误:'INTMAX_MAX'未在此范围内声明
我所做的:
编译器信息:
[huqiu @ 101〜] $ which g ++
/ usr / bin / g ++
和版本:
[huqiu @ 101〜] $ g ++ -v
使用内置规格。
目标:x86_64-redhat-linux
配置为:../configure --prefix = / usr --mandir = / usr / share / man --infodir = / usr / share / info - with-bugurl = http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads = posix --enable-checking = release --with-system-zlib --enable- __cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-languages = c,c ++,objc,obj-c ++,java,fortran,ada --enable -java -awt = gtk --disable -dssi --with-java-home = / usr / lib / jvm / java-1.5.0 -gcj-1.5.0.0 / jre
--enable-libgcj-multifile --enable -java-maintainer-mode --with-ecj-jar = / usr / share / java / eclipse-ecj.jar --disable-libjava-multilib --with-ppl --with-cloog --with-tune = generic --with-arch_32 = i686 --build = x86_64-redhat-linux
线程模型:posix
gcc版本4.4.7 20120313(Red Hat 4.4.7-4)(GCC)
我检查了包含路径:
[huqiu @ 101〜] $ gcc -o test.o test.cpp -v
...
COLLECT_GCC_OPTIONS =' - o''test.o''-v''-mtune = generic'
/usr/libexec/gcc/x86_64-redhat-linux/4.4.7/cc1plus -quiet -v -D_GNU_SOURCE test.cpp -quiet -dumpbase test.cpp -mtune = generic -auxbase test -version -o /tmp/ccjZyOY4.s
忽略不存在的目录/usr/lib/gcc/x86_64-redhat-linux/4.4。 7 / include-fixed
忽略不存在的目录/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../x86_64-redhat-linux/include
#include...搜索从这里开始:
#include< ...>搜索从这里开始:
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7
/ usr /lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/x86_64-redhat-linux
/ usr / lib / gcc /x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/backward
/ usr / local / include
/ usr / lib /gcc/x86_64-redhat-linux/4.4.7/include
/ usr / include
搜索列表结束。
GNU C ++(GCC)版本4.4.7 20120313(Red Hat 4.4.7-4)(x86_64-redhat-linux)
由GNU C编译版本4.4.7 20120313(Red Hat 4.4.7-4),GMP版本4.3.1,MPFR版本2.4.1。
GGC启发式:--param ggc-min-expand = 100 --param ggc-min-heapsize = 131072
编译器可执行校验和:9beacdb5724f8325308f81d8bbfbf884
test.cpp:In function'int main )':
test.cpp:5:错误:'INTMAX_MAX'未在此范围内声明
还有依赖关系:
[huqiu @ 101〜] $ gcc -M test .cpp
test.o:test.cpp /usr/include/stdint.h /usr/include/features.h \
/usr/include/sys/cdefs.h / usr / include / bits / wordsize.h \
/usr/include/gnu/stubs.h /usr/include/gnu/stubs-64.h \
/usr/include/bits/wchar.h / usr / include / stdio.h \
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/include/stddef.h \
/ usr / include / bits / types。 h /usr/include/bits/typesizes.h \
/usr/include/libio.h /usr/include/_G_config.h /usr/include/wchar.h \
/ usr / lib / gcc / x86_64-redhat-linux / 4.4.7 / include / stdarg.h \
/usr/include/bits/stdio_lim.h / usr / inclu de / bits / sys_errlist.h
我相信 / usr / include
中:
<$ p $ (__INT64_C(9223372036854775807))
#define UINTMAX_MAX(__UINT64_C(__INT64_C(9223372036854775807))
$ [$ q $ c $] $ cat /usr/include/stdint.h | grep INTMAX_MAX
# 18446744073709551615))
gcc -E $ b
[huqiu @ 101〜] $ gcc -E test.cpp | grep INTMAX_MAX
intmax_t max = INTMAX_MAX;
我应该怎样做什么?
一切都看起来不错。我在gcc版本较低的其他机器上成功编译了代码,例如 4.2.x
。
我认为可能有一些重要的东西让我错了。
任何帮助和提示都会很棒。在此先感谢:)
嗯,首先,您正在将代码编译为C ++。由于这些宏源于C99,因此理论上它们最终会与相同名称的现有C ++定义冲突。出于某些原因,GCC编译器可以安全地使用它:它希望你在这些宏定义可用之前明确地请求这些宏定义。
在我的GCC安装中,宏定义受< ($定义__cplusplus || __cplusplus> = 201103L \
||定义__STDC_LIMIT_MACROS)
$ b $ pre $
由于您明显将代码编译为C ++ 11 C ++之前版本,因此您必须通过定义 __ STDC_LIMIT_MACROS
,其中包括 stdint.h
。但同时,如果以 -std = c ++ 11
模式运行编译器,代码将按原样编译。
另请参阅什么是__STDC_LIMIT_MACROS和__STDC_CONSTANT_MACROS是什么意思?
When Compiling a simple code snippets: test.cpp
:
#include <stdint.h>
#include <stdio.h>
int main()
{
intmax_t max = INTMAX_MAX;
printf("%jd", max);
return 0;
}
I get this error:
[huqiu@101 ~]$ g++ -o test.o test.cpp
test.cpp: In function ‘int main()’:
test.cpp:5: error: ‘INTMAX_MAX’ was not declared in this scope
What I've done:
The compiler information:
[huqiu@101 ~]$ which g++
/usr/bin/g++
And the version:
[huqiu@101 ~]$ g++ -v
Using built-in specs.
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk --disable-dssi --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre
--enable-libgcj-multifile --enable-java-maintainer-mode --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib --with-ppl --with-cloog --with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux
Thread model: posix
gcc version 4.4.7 20120313 (Red Hat 4.4.7-4) (GCC)
I've checked the include path:
[huqiu@101 ~]$ gcc -o test.o test.cpp -v
...
COLLECT_GCC_OPTIONS='-o' 'test.o' '-v' '-mtune=generic'
/usr/libexec/gcc/x86_64-redhat-linux/4.4.7/cc1plus -quiet -v -D_GNU_SOURCE test.cpp -quiet -dumpbase test.cpp -mtune=generic -auxbase test -version -o /tmp/ccjZyOY4.s
ignoring nonexistent directory "/usr/lib/gcc/x86_64-redhat-linux/4.4.7/include-fixed"
ignoring nonexistent directory "/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../x86_64-redhat-linux/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/x86_64-redhat-linux
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/backward
/usr/local/include
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/include
/usr/include
End of search list.
GNU C++ (GCC) version 4.4.7 20120313 (Red Hat 4.4.7-4) (x86_64-redhat-linux)
compiled by GNU C version 4.4.7 20120313 (Red Hat 4.4.7-4), GMP version 4.3.1, MPFR version 2.4.1.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 9beacdb5724f8325308f81d8bbfbf884
test.cpp: In function ‘int main()’:
test.cpp:5: error: ‘INTMAX_MAX’ was not declared in this scope
And also the dependency:
[huqiu@101 ~]$ gcc -M test.cpp
test.o: test.cpp /usr/include/stdint.h /usr/include/features.h \
/usr/include/sys/cdefs.h /usr/include/bits/wordsize.h \
/usr/include/gnu/stubs.h /usr/include/gnu/stubs-64.h \
/usr/include/bits/wchar.h /usr/include/stdio.h \
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/include/stddef.h \
/usr/include/bits/types.h /usr/include/bits/typesizes.h \
/usr/include/libio.h /usr/include/_G_config.h /usr/include/wchar.h \
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/include/stdarg.h \
/usr/include/bits/stdio_lim.h /usr/include/bits/sys_errlist.h
I am sure that stdint.h
is existent in /usr/include
:
[huqiu@101 ~]$ cat /usr/include/stdint.h |grep INTMAX_MAX
# define INTMAX_MAX (__INT64_C(9223372036854775807))
# define UINTMAX_MAX (__UINT64_C(18446744073709551615))
gcc -E
[huqiu@101 ~]$ gcc -E test.cpp | grep INTMAX_MAX
intmax_t max = INTMAX_MAX;
what should I do?
Everything looks right. I compiled the code successfully in other machine whose gcc version is lower, such as 4.2.x
.
I think there may be something important I made them wrong.
Any help and tips will be great. Thanks in advance :)
Well, first and foremost, you are compiling your code as C++. Since these macros originate from C99, they can theoretically end up conflicting with existing C++ definitions for the same names. For which reason GCC compiler plays it safe: it wants you to explicitly request these macro definitions before they become available.
In my GCC installation the macro definitions are protected by
#if (!defined __cplusplus || __cplusplus >= 201103L \
|| defined __STDC_LIMIT_MACROS)
Since you are apparently compiling your code as pre-C++11 C++, you have to request these macros by defining __STDC_LIMIT_MACROS
before including stdint.h
. But at the same time your code will compile "as is" if you run the compiler in -std=c++11
mode.
Also see What do __STDC_LIMIT_MACROS and __STDC_CONSTANT_MACROS mean?
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