问题描述
我正在尝试使用工具 afl (link) 进行一些模糊测试。我下载了 ImageMagick as described in the docs 的源代码，但是当我尝试使用 afl 编译器运行 ./configure 时出现错误：
$ CC=/usr/local/bin/afl-gcc CXX=/usr/local/bin/afl-g++ ./configure --disable-shared
[...]
checking whether we are using the GNU C++ compiler... no
checking whether /usr/local/bin/afl-g++ accepts -g... no
checking dependency style of /usr/local/bin/afl-g++... none
checking how to run the C++ preprocessor... /lib/cpp
configure: error: in `/home/ubuntu/ImageMagick-7.0.10':
configure: error: C++ preprocessor "/lib/cpp" fails sanity check
See `config.log' for more details
如果我尝试使用默认的 C++ 编译器，一切似乎都很好：
$ CC=/usr/local/bin/afl-gcc ./configure --disable-shared #this works
如何让编译器运行？
更新
查看 config.log 内部，问题似乎与 ImageMagick 无法检查 afl-g++ 版本有关：
configure:15015: checking for C++ compiler version
configure:15024: /usr/local/bin/afl-g++ --version >&5
)B[?25h[0m[1;91m
[-] PROGRAM ABORT : [1;97mOops,failed to execute 'g++' - check your PATH[1;91m
Location : [0mmain(),afl-gcc.c:334
configure:15035: $? = 1
无论如何，afl-g++ 似乎有效：
$ afl-g++
afl-cc 2.52b by <[email protected]>
This is a helper application for afl-fuzz. It serves as a drop-in replacement
for gcc or clang,letting you recompile third-party code with the required
runtime instrumentation. A common use pattern would be one of the following:
CC=/usr/local/bin/afl-gcc ./configure
CXX=/usr/local/bin/afl-g++ ./configure
You can specify custom next-stage toolchain via AFL_CC,AFL_CXX,and AFL_AS.
Setting AFL_HARDEN enables hardening optimizations in the compiled code.
但是 afl-g++ -v 报告错误：
$ afl-g++ -v
afl-cc 2.52b by <[email protected]>
[-] PROGRAM ABORT : Oops,failed to execute 'g++' - check your PATH
Location : main(),afl-gcc.c:334
解决方法
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