【问题】
折腾：
【记录】cygwin下在针对arm920t去ct-ng menuconfig配置后去ct-ng build去编译
期间，在
Installing C library
的
Building C library
阶段，出错了：
[INFO ] ================================================================= [INFO ] Installing C library [EXTRA] Configuring C library [EXTRA] Building C library [ERROR] ../wcsmbs/uchar.h:47:5: error: #error "<uchar.h> requires ISO C11 mode" [ERROR] ../wcsmbs/uchar.h:52: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'char16_t' [ERROR] ../wcsmbs/uchar.h:53: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'char32_t' [ERROR] ../wcsmbs/uchar.h:61: error: expected ')' before '*' token [ERROR] ../wcsmbs/uchar.h:66: error: expected declaration specifiers or '...' before 'char16_t' [ERROR] ../wcsmbs/uchar.h:73: error: expected ')' before '*' token [ERROR] ../wcsmbs/uchar.h:78: error: expected declaration specifiers or '...' before 'char32_t' [ERROR] c16rtomb.c:27: error: expected declaration specifiers or '...' before 'char16_t' [ERROR] c16rtomb.c:31: error: 'c16' undeclared (first use in this function) [ERROR] c16rtomb.c:31: error: (Each undeclared identifier is reported only once [ERROR] c16rtomb.c:31: error: for each function it appears in.) [ERROR] make[3]: *** [/home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/build/build-libc-final/wcsmbs/c16rtomb.o] Error 1 [ERROR] ../wcsmbs/uchar.h:47:5: error: #error "<uchar.h> requires ISO C11 mode" [ERROR] ../wcsmbs/uchar.h:52: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'char16_t' [ERROR] ../wcsmbs/uchar.h:53: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'char32_t' [ERROR] ../wcsmbs/uchar.h:61: error: expected ')' before '*' token [ERROR] ../wcsmbs/uchar.h:66: error: expected declaration specifiers or '...' before 'char16_t' [ERROR] ../wcsmbs/uchar.h:73: error: expected ')' before '*' token [ERROR] ../wcsmbs/uchar.h:78: error: expected declaration specifiers or '...' before 'char32_t' [ERROR] mbrtoc16.c:37: error: expected ')' before '*' token [ERROR] make[3]: *** [/home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/build/build-libc-final/wcsmbs/mbrtoc16.o] Error 1 [ERROR] make[2]: *** [wcsmbs/subdir_lib] Error 2 [ERROR] make[1]: *** [all] Error 2 [ERROR] - [ERROR] >> [ERROR] >> Build failed in step 'Installing C library' [ERROR] >> called in step '(top-level)' [ERROR] >> [ERROR] >> Error happened in: CT_DoExecLog[scripts/[email protected]] [ERROR] >> called from: do_libc_backend_once[scripts/build/libc/[email protected]] [ERROR] >> called from: do_libc_backend[scripts/build/libc/[email protected]] [ERROR] >> called from: do_libc[scripts/build/libc/[email protected]] [ERROR] >> called from: main[scripts/[email protected]] / Current command: 'make' '-j4' '-l' 'all' exited with error code: 2 Please fix it up and finish by exiting the shell with one of these values: 1 fixed, continue with next build command 2 repeat this build command 3 abort build ct-ng:/home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/build/build-libc-final>
如图：
即：
| ../wcsmbs/uchar.h:47:5: error: #error "<uchar.h> requires ISO C11 mode" |
【解决过程】
1.去看看对应的log文件：
E:\dev_install_root\cygwin\home\develop\crosstool-ng\crosstool-ng-1.18.0_build\build.log
中的内容是：
/home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/build/build-libc-final/wcsmbs/isoc99_wscanf.o -MD -MP -MF /home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/build/build-libc-final/wcsmbs/isoc99_wscanf.o.dt -MT /home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/build/build-libc-final/wcsmbs/isoc99_wscanf.o [ALL ] arm-arm920t-linux-gnueabi-gcc isoc99_vwscanf.c -c -std=gnu99 -fgnu89-inline -O -O2 -U_FORTIFY_SOURCE -Wall -Winline -Wwrite-strings -fmerge-all-constants -frounding-math -march=armv4t -mlittle-endian -msoft-float -mtune=arm920t -Wstrict-prototypes -fexceptions -I../include -I/home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/build/build-libc-final/wcsmbs -I/home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/build/build-libc-final -I../ports/sysdeps/unix/sysv/linux/arm/nptl -I../ports/sysdeps/unix/sysv/linux/arm -I../nptl/sysdeps/unix/sysv/linux -I../nptl/sysdeps/pthread -I../sysdeps/pthread -I../ports/sysdeps/unix/sysv/linux -I../sysdeps/unix/sysv/linux -I../sysdeps/gnu -I../sysdeps/unix/inet -I../nptl/sysdeps/unix/sysv -I../ports/sysdeps/unix/sysv -I../sysdeps/unix/sysv -I../ports/sysdeps/unix/arm -I../nptl/sysdeps/unix -I../ports/sysdeps/unix -I../sysdeps/unix -I../sysdeps/posix -I../ports/sysdeps/arm/nptl -I../ports/sysdeps/arm -I../sysdeps/wordsize-32 -I../sysdeps/ieee754/flt-32 -I../sysdeps/ieee754/dbl-64 -I../sysdeps/ieee754 -I../sysdeps/generic -I../nptl -I../ports -I.. -I../libio -I. -nostdinc -isystem /home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/buildtools/lib/gcc/arm-arm920t-linux-gnueabi/4.3.2/include -isystem /home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/buildtools/lib/gcc/arm-arm920t-linux-gnueabi/4.3.2/include-fixed -isystem /home/develop/crosstool-ng/x-tools/arm-arm920t-linux-gnueabi/arm-arm920t-linux-gnueabi/sysroot/usr/include -D_LIBC_REENTRANT -include ../include/libc-symbols.h -D_IO_MTSAFE_IO -o /home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/build/build-libc-final/wcsmbs/isoc99_vwscanf.o -MD -MP -MF /home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/build/build-libc-final/wcsmbs/isoc99_vwscanf.o.dt -MT /home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/build/build-libc-final/wcsmbs/isoc99_vwscanf.o [ALL ] In file included from ../include/uchar.h:1, [ALL ] from c16rtomb.c:19: [ERROR] ../wcsmbs/uchar.h:47:5: error: #error "<uchar.h> requires ISO C11 mode" [ALL ] In file included from ../include/uchar.h:1, [ALL ] from c16rtomb.c:19: [ERROR] ../wcsmbs/uchar.h:52: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'char16_t' [ERROR] ../wcsmbs/uchar.h:53: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'char32_t' [ERROR] ../wcsmbs/uchar.h:61: error: expected ')' before '*' token [ERROR] ../wcsmbs/uchar.h:66: error: expected declaration specifiers or '...' before 'char16_t' [ERROR] ../wcsmbs/uchar.h:73: error: expected ')' before '*' token [ERROR] ../wcsmbs/uchar.h:78: error: expected declaration specifiers or '...' before 'char32_t' [ERROR] c16rtomb.c:27: error: expected declaration specifiers or '...' before 'char16_t' [ALL ] c16rtomb.c: In function 'c16rtomb': [ERROR] c16rtomb.c:31: error: 'c16' undeclared (first use in this function) [ERROR] c16rtomb.c:31: error: (Each undeclared identifier is reported only once [ERROR] c16rtomb.c:31: error: for each function it appears in.) [ERROR] make[3]: *** [/home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/build/build-libc-final/wcsmbs/c16rtomb.o] Error 1 [ALL ] make[3]: *** Waiting for unfinished jobs.... [ALL ] In file included from ../include/uchar.h:1, [ALL ] from mbrtoc16.c:23: [ERROR] ../wcsmbs/uchar.h:47:5: error: #error "<uchar.h> requires ISO C11 mode" [ALL ] In file included from ../include/uchar.h:1, [ALL ] from mbrtoc16.c:23: [ERROR] ../wcsmbs/uchar.h:52: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'char16_t' [ERROR] ../wcsmbs/uchar.h:53: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'char32_t' [ERROR] ../wcsmbs/uchar.h:61: error: expected ')' before '*' token [ERROR] ../wcsmbs/uchar.h:66: error: expected declaration specifiers or '...' before 'char16_t' [ERROR] ../wcsmbs/uchar.h:73: error: expected ')' before '*' token [ERROR] ../wcsmbs/uchar.h:78: error: expected declaration specifiers or '...' before 'char32_t' [ERROR] mbrtoc16.c:37: error: expected ')' before '*' token [ERROR] make[3]: *** [/home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/build/build-libc-final/wcsmbs/mbrtoc16.o] Error 1 [ALL ] make[3]: Leaving directory `/home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/src/eglibc-2_17/wcsmbs' [ERROR] make[2]: *** [wcsmbs/subdir_lib] Error 2 [ALL ] make[2]: Leaving directory `/home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/src/eglibc-2_17' [ERROR] make[1]: *** [all] Error 2 [ALL ] make[1]: Leaving directory `/home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/build/build-libc-final' [ERROR] [ERROR] >> [ERROR] >> Build failed in step 'Installing C library' [ERROR] >> called in step '(top-level)' [ERROR] >> [ERROR] >> Error happened in: CT_DoExecLog[scripts/[email protected]] [ERROR] >> called from: do_libc_backend_once[scripts/build/libc/[email protected]] [ERROR] >> called from: do_libc_backend[scripts/build/libc/[email protected]] [ERROR] >> called from: do_libc[scripts/build/libc/[email protected]] [ERROR] >> called from: main[scripts/[email protected]]
2.参考：
才找到源代码，原来是：
E:\dev_install_root\cygwin\home\develop\crosstool-ng\crosstool-ng-1.18.0_build\.build\src\eglibc-2_17\include\uchar.h
其中是：
#include <wcsmbs/uchar.h>
所以去看：
E:\dev_install_root\cygwin\home\develop\crosstool-ng\crosstool-ng-1.18.0_build\.build\src\eglibc-2_17\wcsmbs
找到：
E:\dev_install_root\cygwin\home\develop\crosstool-ng\crosstool-ng-1.18.0_build\.build\src\eglibc-2_17\wcsmbs\uchar.h
看到：
#if defined __GNUC__ && !defined __USE_ISOCXX11 /* Define the 16-bit and 32-bit character types. Use the information provided by the compiler. */ # if !defined __CHAR16_TYPE__ || !defined __CHAR32_TYPE__ # if defined __STDC_VERSION__ && __STDC_VERSION__ < 201000L # error "<uchar.h> requires ISO C11 mode" # else # error "definitions of __CHAR16_TYPE__ and/or __CHAR32_TYPE__ missing" # endif # endif typedef __CHAR16_TYPE__ char16_t; typedef __CHAR32_TYPE__ char32_t; #endif
继续参考：
去看看自己的gcc的版本：
[email protected] /home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/buildtools/bin $ ./arm-arm920t-linux-gnueabi-gcc arm-arm920t-linux-gnueabi-gcc.exe arm-arm920t-linux-gnueabi-gcc-4.3.2.exe arm-arm920t-linux-gnueabi-gccbug [email protected] /home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/buildtools/bin $ ./arm-arm920t-linux-gnueabi-gcc --version arm-arm920t-linux-gnueabi-gcc (crosstool-NG 1.18.0) 4.3.2 Copyright (C) 2008 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. [email protected] /home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/buildtools/bin $ ./arm-arm920t-linux-gnueabi-gcc -v Using built-in specs. Target: arm-arm920t-linux-gnueabi Configured with: /home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/src/gcc-4.3.2/configure --build=i686-build_pc-cygwin --host=i686-build_pc-cygwin --target=arm-arm920t-linux-gnueabi --prefix=/home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/buildtools --with-local-prefix=/home/develop/crosstool-ng/x-tools/arm-arm920t-linux-gnueabi/arm-arm920t-linux-gnueabi/sysroot --disable-libmudflap --with-sysroot=/home/develop/crosstool-ng/x-tools/arm-arm920t-linux-gnueabi/arm-arm920t-linux-gnueabi/sysroot --enable-shared --with-pkgversion='crosstool-NG 1.18.0' --with-arch=armv4t --with-tune=arm920t --with-float=soft --enable-__cxa_atexit --with-gmp=/home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/buildtools --with-mpfr=/home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/buildtools --enable-target-optspace --disable-libgomp --disable-libmudflap --disable-nls --disable-multilib --enable-languages=c Thread model: posix gcc version 4.3.2 (crosstool-NG 1.18.0)
结果看不到什么c99或c11。
3.参考：
Commit 4efeffc1d583597e4f52985b9747269e47b754e2 breaks trunk for i386and x86_64 on older GCCs.
提到了此问题。
看到其提到了gcc，所以顺带看了看当前cygwin下的gcc：
[email protected] /home/develop/crosstool-ng/crosstool-ng-1.18.0_build/.build/arm-arm920t-linux-gnueabi/buildtools/bin $ gcc -v 使用内建 specs。 COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/i686-pc-cygwin/4.5.3/lto-wrapper.exe 目标：i686-pc-cygwin 配置为：/gnu/gcc/releases/respins/4.5.3-3/gcc4-4.5.3-3/src/gcc-4.5.3/configure --srcdir=/gnu/gcc/releases/respins/4.5.3-3/gcc4-4.5.3-3/src/gcc-4.5.3 --prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --libexecdir=/usr/lib --datadir=/usr/share --localstatedir=/var --sysconfdir=/etc --datarootdir=/usr/share --docdir=/usr/share/doc/gcc4 -C --datadir=/usr/share --infodir=/usr/share/info --mandir=/usr/share/man -v --with-gmp=/usr --with-mpfr=/usr --enable-bootstrap --enable-version-specific-runtime-libs --libexecdir=/usr/lib --enable-static --enable-shared --enable-shared-libgcc --disable-__cxa_atexit --with-gnu-ld --with-gnu-as --with-dwarf2 --disable-sjlj-exceptions --enable-languages=ada,c,c++,fortran,java,lto,objc,obj-c++ --enable-graphite --enable-lto --enable-java-awt=gtk --disable-symvers --enable-libjava --program-suffix=-4 --enable-libgomp --enable-libssp --enable-libada --enable-threads=posix --with-arch=i686 --with-tune=generic --enable-libgcj-sublibs CC=gcc-4 CXX=g++-4 CC_FOR_TARGET=gcc-4 CXX_FOR_TARGET=g++-4 GNATMAKE_FOR_TARGET=gnatmake GNATBIND_FOR_TARGET=gnatbind --with-ecj-jar=/usr/share/java/ecj.jar 线程模型：posix gcc 版本 4.5.3 (GCC)
我这里是4.5.3的。
然后此刻才注意到，上面的：
arm-arm920t-linux-gnueabi-gcc
是
gcc version 4.3.2
的，其不支持c11。
但是不懂。
参考了：
有点看懂了：
其是把glibc-2.16.0换成glibc-2.15，以解决的问题。
4.所以，我此处，应该是：
把当前的eglibc从2.17，换成更低的版本，才对。
所以，去把eglibc，换为2.16试试：
C library (eglibc) --->
eglibc version (2_16) --->然后ct-ng clean后，重新编译：
5.不过还没编译，先去：
所以明白了：
估计glibc 2.16，也是要c11的，所以此处，还是把对应的eglibc，也弄到更低的版本，比如2.15，而不要选2.16了。
所以去ct-ng menuconfig，设置为：
| C library (eglibc) —> eglibc version (2_15) —> |
然后再去重新编译。
6.没编译之前，再去看看，是不是还有其他支持c11的gcc版本可以选择，
然后发现，其实也是有4.7之后的gcc可供选择的。
不过，暂时还是不去换gcc了。
还是继续上面的，用
gcc version (4.3.2)
然后加上：
eglibc version (2_15)
去编译看看。
最终，算是解决了此处的：
| ../wcsmbs/uchar.h:47:5: error: #error "<uchar.h> requires ISO C11 mode" |
的错误。
【总结】
此处，在cygwin下编译crosstool-ng，在：
Installing C library
的
Building C library
阶段，出现：
| ../wcsmbs/uchar.h:47:5: error: #error "<uchar.h> requires ISO C11 mode" |
的错误的原因是：
此处crosstool-ng中的配置是：
gcc 4.3.2
eglibc 2.17
而eglibc 2.17（和glibc的2.17类似），是支持c11版本的c库的，所以其头文件：
crosstool-ng-1.18.0_build\.build\src\eglibc-2_17\wcsmbs\uchar.h
中有此版本要求：
#if defined __GNUC__ && !defined __USE_ISOCXX11 /* Define the 16-bit and 32-bit character types. Use the information provided by the compiler. */ # if !defined __CHAR16_TYPE__ || !defined __CHAR32_TYPE__ # if defined __STDC_VERSION__ && __STDC_VERSION__ < 201000L # error "<uchar.h> requires ISO C11 mode" # else # error "definitions of __CHAR16_TYPE__ and/or __CHAR32_TYPE__ missing" # endif # endif typedef __CHAR16_TYPE__ char16_t; typedef __CHAR32_TYPE__ char32_t; #endif
要求必须支持c11。
而此处的gcc 4.3.2，是不支持c11的。
对应的是，至少4.7的gcc才支持c11的。
所以：
要么把gcc换成4.7或更高版本；
要么把eglibc换成（不需要强制要求支持c11的）低版本，比如eglibc 2.15或更低的版本
此处，就选择了后者：
把eglibc，换成，无需要求c11的，2.15版本的，就可以了。
对应的crosstool-ng中的配置如下：
| C compiler (gcc) —> gcc version (4.3.2) —> C library (eglibc) —> eglibc version (2_15) —> |
不过又出现其他错误：
转载请注明：在路上 » 【已解决】cygwin下编译crosstool-ng在Building C library时出错：../wcsmbs/uchar.h:47:5: error: #error "<uchar.h> requires ISO C11 mode"