Bug#800045: ada: undefined reference to lrealpath in libgnatprj.so

[Nicolas Boulenguez <nicolas@debian.org>]

Package: gnat-5
Version: 5.2.1-17
Severity: normal

Hello.
If main.adb contains:
  procedure Main is begin null; end Main;
and is compiled with
# gcc-5 -c main.adb
# gnatbind-5 -x main.ali
# LANG=C gnatlink-5 main.ali -lgnatprj
the build fails:
 /usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/libgnatprj.so: undefined reference to `lrealpath'
 collect2: error: ld returned 1 exit status
 gnatlink-5: error when calling /usr/bin/gcc-5

-- System Information:
Versions of packages gnat-5 depends on:
ii  gcc-5              5.2.1-17
ii  gcc-5-base         5.2.1-17
ii  libc6              2.19-20
ii  libc6-dev          2.19-20
ii  libgcc1            1:5.2.1-17
ii  libgmp10           2:6.0.0+dfsg-7
ii  libgnat-5          5.2.1-17
ii  libgnatprj5        5.2.1-17
ii  libgnatvsn5        5.2.1-17
ii  libisl13           0.14-2
ii  libmpc3            1.0.3-1
ii  libmpfr4           3.1.3-1
ii  multiarch-support  2.19-20
ii  zlib1g             1:1.2.8.dfsg-2+b1