在Mac OS Lion上使用pkg-config在Include目录中使用反斜杠

Question

Good evening everybody,

I have virtually no experience with pkg-config but it seems that I will have to use it in working with openssl. Im on a Mac, which might be of some importance.

The problem is:

• i compile my testing program with

   cc test.cc `pkg-config --libs --cflags openssl` -o test 

• i have compiled openssl and installed it in ~/openssl afterwards adding ~/openssl/lib/pkgconfig to the PKG_CONFIG_PATH
• since I want to use the newest version instead of the preinstalled one, I specify the options with every compilation
• the result of running pkg-config --libs or pkg-config --cflags openssl is -L\\~/openssl/lib -lssl -lcrypto

This begs the question for me why there is a backsash and whether my compiled version is used or the preinstalled one and if the first one is the case how i could possibly fix this...

Any kind of help is appreciated

Answer 1

The expansion of ~ to your home directory only occurs in certain circumstances. Basically, it's the shell that's doing it. If a program or a file API sees the tilde, it is interpreted as a literal; it's not expanded.

Use $HOME when setting PKG_CONFIG_PATH instead, as in $HOME/openssl .