failed build with ccache

[Elbandi]

When cache is using, the build is failed:

In file included from net.c:46:
tr-utp.h:32:24: error: libutp/utp.h: No such file or directory

checking for g++... g++
..
checking for g++... no
..
checking µTP... no

utp build need g++, which is exists (see first checking line), but if cache is used this is a link:

# ls -l /usr/lib/ccache/g++
lrwxrwxrwx 1 root root 16 May 12 01:26 /usr/lib/ccache/g++ -> ../../bin/ccache

But when you check for g++ (HAVE_CXX) with file test: if test -f "$CXX"; then

Possible solution:

HAVE_CXX="yes"
AC_PROG_CXX(,HAVE_CXX="no")

[jordan]

Elbandi, there was a change post-2.51 that may have fixed this (https://trac.transmissionbt.com/changeset/13283/) ... can you repeat the test case with that change?

[Elbandi]

I can do that tomorrow, but at first sight that commit is wrong too, becasue $CXX is tested with -f (is file?), /usr/lib/ccache/g++. Anyway, You do double check: first made by AC_PROG_CXX, seconds made Your test code.

[Elbandi]

test with 2.52, looks good:

checking for g++... g++
...
checking for g++... yes
...
checking µTP... yes

But it is my opinion that the built-in AC checking is the better choice...