Hi,

when build lightdm-1.30.0 getting below error.



config.status: executing libtool commands
config.status: executing po/stamp-it commands

Light Display Manager 1.30.0
===========================

prefix: /usr
Greeter session: lightdm-gtk-greeter
Greeter user: lightdm
User session: default
GObject introspection: yes
Vala bindings: yes
liblightdm-qt: no
liblightdm-qt5: yes
libaudit support: no
Enable tests: no

make all-recursive
make[1]: Entering directory '/sources/BLFS/lightdm-1.30.0'
Making all in common
make[2]: Entering directory '/sources/BLFS/lightdm-1.30.0/common'
make[2]: Nothing to be done for 'all'.
make[2]: Leaving directory '/sources/BLFS/lightdm-1.30.0/common'
Making all in liblightdm-gobject
make[2]: Entering directory '/sources/BLFS/lightdm-1.30.0/liblightdm-gobject'
make[2]: Nothing to be done for 'all'.
make[2]: Leaving directory '/sources/BLFS/lightdm-1.30.0/liblightdm-gobject'
Making all in liblightdm-qt
make[2]: Entering directory '/sources/BLFS/lightdm-1.30.0/liblightdm-qt'
make all-am
make[3]: Entering directory '/sources/BLFS/lightdm-1.30.0/liblightdm-qt'
CXX liblightdm_qt5_3_la-greeter.lo
In file included from /usr/include/c++/9.2.0/bits/stl_algo.h:59,
from /usr/include/c++/9.2.0/algorithm:62,
from /opt/qt5/include/QtCore/qglobal.h:142,
from /opt/qt5/include/QtCore/qnamespace.h:43,
from /opt/qt5/include/QtCore/qobjectdefs.h:48,
from /opt/qt5/include/QtCore/qobject.h:46,
from /opt/qt5/include/QtCore/QObject:1,
from QLightDM/greeter.h:15,
from greeter.cpp:13:
/usr/include/c++/9.2.0/cstdlib:75:15: fatal error: stdlib.h: No such file or directory
75 | #include_next <stdlib.h>
| ^~~~~~~~~~
compilation terminated.
make[3]: *** [Makefile:712: liblightdm_qt5_3_la-greeter.lo] Error 1
make[3]: Leaving directory '/sources/BLFS/lightdm-1.30.0/liblightdm-qt'
make[2]: *** [Makefile:562: all] Error 2
make[2]: Leaving directory '/sources/BLFS/lightdm-1.30.0/liblightdm-qt'
make[1]: *** [Makefile:484: all-recursive] Error 1
make[1]: Leaving directory '/sources/BLFS/lightdm-1.30.0'
make: *** [Makefile:416: all] Error 2

Fix that, then see where it pukes.

Hi,
Iam not a senior developer can we please elaborate

What is in /usr/include/c++

libstd c++

Neither am I.
It's looking for the named header file /usr/include/c++/9.2.0/cstdlib.h, and can't find it. From my box (on gcc-9.3.0)

That one, I would think.

I have stdlib.h both in /usr/include and /usr/include/c++/9.3.0. If not found the compiler (g++ and/or gcc) was not installed properly (or corrupted). I would try to reinstall.

Go back to post #1, and look at your tailspin above the words 'Compilation Terminated'
I haven't seen your new error, but let's presume it's identical - cstdlib.h on line 75 including stdlib.h

On my system, I don't have a cstdlib.h in that spot, but I do have stdlib.h. I presume they've rejigged the includes between releases. Just running file on it I get this: That doesn't protect you from copying in some one of the many stdlib.h files on a normal system. If the file is in place, it's an inconvenience. We're just telling you, it's your compiler you have to argue with, not us.

I think it can be solved without problems using the manual