c嵌入式错误:“ xxxx”声明为返回函数的函数

Question

我正在尝试跨编译拉帕克库（fortran）和c api，lapacke，用于裸机嵌入式目标powerpc-eabi目标，使用GCC交叉编译器，用于此目标。编译进行进行，但最终遇到了此错误：

[ 44%] Building C object LAPACKE/CMakeFiles/lapacke.dir/src/lapacke_cbbcsd.c.obj
cd /home/rcrozier/build/powerpc-eabi/lapack/LAPACKE && /usr/local/powerpc-eabi/bin/powerpc-eabi-gcc  -DADD_ -mcpu=750 -I/home/rcrozier/src/fast-v8-hg/cross-dependancies/lapack-3.6.0/LAPACKE/include    -o CMakeFiles/lapacke.dir/src/lapacke_cbbcsd.c.obj   -c /home/rcrozier/src/fast-v8-hg/cross-dependancies/lapack-3.6.0/LAPACKE/src/lapacke_cbbcsd.c
In file included from /home/rcrozier/src/fast-v8-hg/cross-dependancies/lapack-3.6.0/LAPACKE/include/lapacke_utils.h:37:0,
                 from /home/rcrozier/src/fast-v8-hg/cross-dependancies/lapack-3.6.0/LAPACKE/src/lapacke_cbbcsd.c:34:
/home/rcrozier/src/fast-v8-hg/cross-dependancies/lapack-3.6.0/LAPACKE/include/lapacke.h:145:22: error: ‘LAPACK_GLOBAL’ declared as function returning a function
 #define LAPACK_lsame LAPACK_GLOBAL(lsame,LSAME)
                      ^

当将C接口构建到Lapack，Lapacke。

时发生此错误。

Lapack论坛上的一篇文章表明，这是Fortran名称杂交的问题，并添加-DADD_处理器标志。上面我尝试了这个，但没有区别。

预处理器定义用于标题文件，复制下面：

#ifndef LAPACK_HEADER_INCLUDED
#define LAPACK_HEADER_INCLUDED
#ifndef LAPACK_GLOBAL
#if defined(LAPACK_GLOBAL_PATTERN_LC) || defined(ADD_)
#define LAPACK_GLOBAL(lcname,UCNAME)  lcname##_
#elif defined(LAPACK_GLOBAL_PATTERN_UC) || defined(UPPER)
#define LAPACK_GLOBAL(lcname,UCNAME)  UCNAME
#elif defined(LAPACK_GLOBAL_PATTERN_MC) || defined(NOCHANGE)
#define LAPACK_GLOBAL(lcname,UCNAME)  lcname
#else
#define LAPACK_GLOBAL(lcname,UCNAME)  lcname##_
#endif
#endif
#endif

错误发生在另一个使用LAPACK_GLOBAL的标头文件中：

#include "lapacke_mangling.h"
#define LAPACK_lsame LAPACK_GLOBAL(lsame,LSAME)
lapack_logical LAPACK_lsame( char* ca,  char* cb,
                              lapack_int lca, lapack_int lcb );

lapacke_mangling.h文件内容如下：

#ifndef LAPACK_HEADER_INCLUDED
#define LAPACK_HEADER_INCLUDED
#endif

本地建造或为另一个Linux目标构建时，不会发生错误，powerpc-linux-gnu。

任何人都可以解释这个问题吗？

Answer 1

实际上是问题是，实际上未与Cmake Build System一起使用预处理器标头文件，而是应该由CMAKE生成其他标头。cmake没有生成文件corectly（可能是由于交叉兼容）。下面的补丁修改了lapacke cmakelists以添加一个选项，以强制使用此标头文件。

--- CMakeLists.txt  2017-11-30 12:07:46.007080017 +0000
+++ newCMakeLists.txt   2017-11-30 12:06:54.491078643 +0000
@@ -3,11 +3,18 @@
 set(LAPACK_INSTALL_EXPORT_NAME lapacke-targets)
+option(FORCE_LAPACKE_MANGLING_WITH_FLAGS "Force the use of the lapack_mangling_with_flags.h header rather than automatic detection" OFF)
+
 # Create a header file netlib.h for the routines called in my C programs
-include(FortranCInterface)
-FortranCInterface_HEADER( ${CMAKE_CURRENT_SOURCE_DIR}/include/lapacke_mangling.h
-                          MACRO_NAMESPACE "LAPACK_"
-                          SYMBOL_NAMESPACE "LAPACK_" )
+if (FORCE_LAPACKE_MANGLING_WITH_FLAGS)
+    # copy the lapacke_mangling_with_flags.h to lapacke_mangling.h
+    configure_file(${CMAKE_CURRENT_SOURCE_DIR}/include/lapacke_mangling_with_flags.h ${CMAKE_CURRENT_SOURCE_DIR}/include/lapacke_mangling.h)
+else (FORCE_LAPACKE_MANGLING_WITH_FLAGS)
+    include(FortranCInterface)
+    FortranCInterface_HEADER( ${CMAKE_CURRENT_SOURCE_DIR}/include/lapacke_mangling.h
+                              MACRO_NAMESPACE "LAPACK_"
+                              SYMBOL_NAMESPACE "LAPACK_" )
+endif (FORCE_LAPACKE_MANGLING_WITH_FLAGS)
 # Old way to detect mangling
 #include(FortranMangling)

这样，我的定义被拾取了，并应用了适当的杂交。