Question

我正在尝试在运行Linux 2.6.31.8 armv5tel的Buffalo LinkStation Pro Duo（unlocking之后）编译GCC 4.7.2。

不幸的是，make会引发一些错误，从

开始

gcc -c  -DIN_GCC_FRONTEND -g -fkeep-inline-functions -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wmissing-formIn file included from ../../gcc-4.7.2/gcc/tree.h:32,
                 from ../../gcc-4.7.2/gcc/c-lang.c:27:
../../gcc-4.7.2/gcc/real.h:53: error: 'SIZEOF_LONG' undeclared here (not in a function)
In file included from ../../gcc-4.7.2/gcc/tree.h:32,
                 from ../../gcc-4.7.2/gcc/c-lang.c:27:
../../gcc-4.7.2/gcc/real.h:87:5: error: division by zero in #if
../../gcc-4.7.2/gcc/real.h:87:5: error: division by zero in #if
../../gcc-4.7.2/gcc/real.h:90:6: error: division by zero in #if

real.h的第53行读取unsigned long sig[SIGSZ];，其中SIGSZ在第40行定义为
#define SIGSZ (SIGNIFICAND_BITS / HOST_BITS_PER_LONG)
第87行是#if REAL_WIDTH == 1，REAL_WIDTH定义从第72行开始为
#define REAL_WIDTH \ (REAL_VALUE_TYPE_SIZE/HOST_BITS_PER_WIDE_INT \ + (REAL_VALUE_TYPE_SIZE%HOST_BITS_PER_WIDE_INT ? 1 : 0)) /* round up */

这似乎归结为HOST_BITS_PER_*为零。我是否必须使用某个configure参数手动定义这些参数，或者如何解决此问题？

更新

config.log包含以下错误：

conftest.c:10:19: error: ppl_c.h: No such file or directory
conftest.c: In function 'main':
conftest.c:16: error: 'choke' undeclared (first use in this function)
conftest.c:16: error: (Each undeclared identifier is reported only once
conftest.c:16: error: for each function it appears in.)
conftest.c:16: error: expected ';' before 'me'
configure:5708: $? = 1
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME ""
| #define PACKAGE_TARNAME ""
| #define PACKAGE_VERSION ""
| #define PACKAGE_STRING ""
| #define PACKAGE_BUGREPORT ""
| #define PACKAGE_URL ""
| #define LT_OBJDIR ".libs/"
| /* end confdefs.h.  */
| #include "ppl_c.h"
| int
| main ()
| {
|.
|     #if PPL_VERSION_MAJOR != 0 || PPL_VERSION_MINOR < 11
|     choke me
|     #endif
|.
|   ;
|   r

关注this post我似乎忘了安装ppl，我现在就试试

Answer 1

SIZEOF_LONG应#define d configure位于文件auto-host.h中auto-host.h。您的/* The size of `long', as computed by sizeof. */ #ifndef USED_FOR_TARGET #define SIZEOF_LONG 8 #endif应包含以下内容：

config.log

如果上述内容不存在（在您的情况下看起来确实如此），请检查checking size of long是否有错误。搜索字符串{{1}}周围的错误。

Answer 2

感谢chill's answer我检查了config.log以发现
conftest.c:10:19: error: ppl_c.h: No such file or directory
（奇怪的是，这并没有阻止configure创建Makefile并返回成功错误代码）。第一个谷歌点击this post，显示我没有提供ppl dependency。
ppl-1.0汇编与我打招呼 checked_float.inlines.hh:1012: error: 'frexpl' was not declared in this scope
这导致我this post建议我使用the 1.1 snapshot代替
现在，gcc的make向我提出了另一个“有用”错误：
gcc/../libcpp/include/line-map.h:66: error: 'CHAR_BIT'
哪个turned out归因于C_INCLUDE_PATH ending with a colon（我已经遇到该帖子中提到的checking LIBRARY_PATH variable... contains current directory错误，但没有考虑检查其他变量）

编译仍在运行，到目前为止还没有错误......

GCC编译产生“real.h：53：错误：'SIZEOF_LONG'在这里未声明（不在函数中）”

2 个答案: