严重错误：apr_time.h：没有这样的文件或目录

Question

#include <apr_time.h>

Is causing the following compile error:

fatal error: apr_time.h: No such file or directory

When I do

locate apr_time.h

It outputs

/usr/include/apr-1.0/apr_time.h

So I believe I have correctly installed the library using sudo apt-get install libapr1-dev . If I do

pkg-config --cflags --libs apr

I get

Package apr was not found in the pkg-config search path.
Perhaps you should add the directory containing `apr.pc'
to the PKG_CONFIG_PATH environment variable
No package 'apr' found

How do I make sure that apr_time.h is found?

Answer 1

Try

#include <apr-1.0/apr_time.h>

instead.