/usr/bin/ld:无法打开输出文件assimp2json:是一个目录

Question

构建assimp2json在经过一些修修补补之后工作得很好，但是Readme.md对构建assimp并不是很清楚。从github dot com/assimp/assimp2json构建时，会出现错误"/usr/bin/ld:无法打开输出文件assimp2json: Is a directory“。在网上搜索这个问题时，我发现用其他软件删除冲突的目录是可以的，但这里不是这样，内容是必需的。此外，重命名文件系统上的目录和CMakeLists.txt中对目录的引用也不起作用，因为这会导致输出文件名被更改为新目录名称的名称。在make手册中，我找不到更改输出路径的选项。在网络上搜索了更多之后，我感觉被卡住了。

减少错误周围的sussinct输出：“

Linking CXX shared library ../../lib/libassimp.so
[ 97%] Built target assimp
Scanning dependencies of target assimp2json
[ 98%] Building CXX object CMakeFiles/assimp2json.dir/assimp2json/main.cpp.o
[ 98%] Building CXX object CMakeFiles/assimp2json.dir/assimp2json/json_exporter.cpp.o
[ 99%] Building C object CMakeFiles/assimp2json.dir/assimp2json/cencode.c.o
[100%] Building CXX object CMakeFiles/assimp2json.dir/assimp2json/mesh_splitter.cpp.o
Linking CXX executable assimp2json
/usr/bin/ld: cannot open output file assimp2json: Is a directory
collect2: error: ld returned 1 exit status
CMakeFiles/assimp2json.dir/build.make:162: recipe for target 'assimp2json' failed
make[2]: *** [assimp2json] Error 1
CMakeFiles/Makefile2:60: recipe for target 'CMakeFiles/assimp2json.dir/all' failed
make[1]: *** [CMakeFiles/assimp2json.dir/all] Error 2
Makefile:117: recipe for target 'all' failed
make: *** [all] Error 2

“。

我用来构建的命令：“

git clone https://github.com/assimp/assimp2json
cd assimp2json
git submodule init
git submodule update
cmake CMakeLists.txt
make

“。

我还尝试了GitHub.com/assimp/assimp/blob/ CMakeLists.txt / -G中所述的"cmake master master 'Unix Makefiles'“，但没有效果。

由于github dot com/assimp/assimp2json是从github dot com/acgessler/assimp2json派生出来的，它的提交次数更多(2013比2015)，所以我也尝试使用相同的命令构建它。并将assimp/cmake-modules/AddGTest.cmake的第34行从"GIT_REPOSITORY github dot com/ chromium.googlesource /google/googletest“改为"GIT_REPOSITORY github dot com/google/googletest/”。

这取得了一些进展，但还不够：“

Linking CXX shared library ../../lib/libassimp.so
[ 80%] Built target assimp
Scanning dependencies of target assimp2json
[ 80%] Building CXX object CMakeFiles/assimp2json.dir/assimp2json/main.cpp.o
[ 81%] Building CXX object CMakeFiles/assimp2json.dir/assimp2json/json_exporter.cpp.o
[ 81%] Building C object CMakeFiles/assimp2json.dir/assimp2json/cencode.c.o
[ 82%] Building CXX object CMakeFiles/assimp2json.dir/assimp2json/mesh_splitter.cpp.o
Linking CXX executable bin/assimp2json
[ 82%] Built target assimp2json
Scanning dependencies of target gtest
[ 82%] Creating directories for 'gtest'
[ 83%] Performing download step (git clone) for 'gtest'
-- gtest download command succeeded.  See also /opt/assimp2json/assimp/test/gtest/src/gtest-stamp/gtest-download-*.log

[ 84%] No patch step for 'gtest'
[ 84%] Performing update step for 'gtest'
Already on 'master'
Your branch is up-to-date with 'origin/master'.
[ 84%] Performing configure step for 'gtest'
-- gtest configure command succeeded.  See also /opt/assimp2json/assimp/test/gtest/src/gtest-stamp/gtest-configure-*.log

[ 85%] Performing build step for 'gtest'
-- gtest build command succeeded.  See also /opt/assimp2json/assimp/test/gtest/src/gtest-stamp/gtest-build-*.log

[ 86%] No install step for 'gtest'
[ 86%] Completed 'gtest'
[ 86%] Built target gtest
Scanning dependencies of target unit
[ 86%] Building C object assimp/test/CMakeFiles/unit.dir/unit/CCompilerTest.c.o
[ 87%] Building CXX object assimp/test/CMakeFiles/unit.dir/unit/Main.cpp.o
In file included from /opt/assimp2json/assimp/test/unit/Main.cpp:1:0:
/opt/assimp2json/assimp/test/unit/UnitTestPCH.h:11:25: fatal error: gtest/gtest.h: No such file or directory
 #include <gtest/gtest.h>
                         ^
compilation terminated.
assimp/test/CMakeFiles/unit.dir/build.make:77: recipe for target 'assimp/test/CMakeFiles/unit.dir/unit/Main.cpp.o' failed
make[2]: *** [assimp/test/CMakeFiles/unit.dir/unit/Main.cpp.o] Error 1
CMakeFiles/Makefile2:250: recipe for target 'assimp/test/CMakeFiles/unit.dir/all' failed
make[1]: *** [assimp/test/CMakeFiles/unit.dir/all] Error 2
Makefile:117: recipe for target 'all' failed
make: *** [all] Error 2

“。

其他人有能力构建这个并愿意分享这个技巧吗？或者其他人没有做到，我应该看看其他软件吗？如果能得到帮助，我们将不胜感激。

Answer 1

assimp2json :使用正确的命令在这里构建OK ...100%构建目标assimp2json

git clone https://github.com/assimp/assimp2json.git
cd assimp2json/
git submodule init
git submodule update
mkdir build
cd build/
cmake ../
make

也就是说，大多数"cmake build“都需要一个build/文件夹。还有:可能你对三年前的代码使用了一个太晚的g++。建议：CXX=g++-4.9 cmake ../ ...还有什么问题吗？然后请使用您的操作系统名称和版本更新您的帖子。