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Re: test programs build failure

From: Thomas Dickey
Subject: Re: test programs build failure
Date: Sat, 4 Sep 2021 14:47:51 -0400
User-agent: Mutt/1.10.1 (2018-07-13)

On Sat, Sep 04, 2021 at 07:59:07PM +0200, Sven Joachim wrote:
> Preparing to update the Debian ncurses packages to the most recent
> patchlevel, I hit an error when trying to build the test programs, see
> the log at [1].

I don't see it in the log, but in last week's update, I made a change
to filter out repeated -D_XOPEN_SOURCE options (to quiet a redefinition
warning with NetBSD, which generally needs 500, but for wide-curses needs
600 (I'd just make it 600, but NetBSD has other problems...).  That fixed
the warning, but inspecting the log showed that it wasn't perfect.

Seeing that -DXPG5 in the log is possibly related.

(I did see and fix a regression for building ncurses/link_test).
> The Debian build process is a bit convoluted, but basically we build the
> libraries with --enable-widec and then configure the test programs
> separately to link with the just build libraries.  The reason for that
> is mainly that we need to run "make install" in the test directory.
> Up to the 20210821 patchlevel this worked, but it broke in the 20210828
> patchlevel.  To track down the problem, I compared the corresponding
> config.log files (not visible at [1], unfortunately) and the culprit
> seems to be that in the 20210828 patchlevel pkg-config support is
> disabled, leading to a failure later on because -ltinfo is missing.

I'll see if I can reproduce this...
> In the successful 20210821 build I get:
> ,----
> | configure:7997: checking pkg-config for ncursesw
> | configure:8000: result: yes
> | configure:8003: checking if the ncursesw package files work
> | configure:8336: gcc -o conftest -g -O2 
> -ffile-prefix-map=/tmp/ncurses-6.2+20210821=. -fstack-protector-strong 
> -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2   
> -I/tmp/ncurses-6.2+20210821/obj-wide/include -D_DEFAULT_SOURCE 
> -D_XOPEN_SOURCE=600 -L/tmp/ncurses-6.2+20210821/obj-wide/lib -Wl,-z,relro 
> -Wl,-z,now conftest.c -lncursesw -ltinfo  >&5
> | configure:8339: $? = 0
> `----
> In the failed 20210828 there is a difference:
> ,----
> | configure:8144: checking pkg-config for ncursesw
> | configure:8147: result: yes
> | configure:8150: checking if the ncursesw package files work
> | configure:8530: gcc -o conftest -g -O2 
> -ffile-prefix-map=/tmp/ncurses-6.2+20210828=. -fstack-protector-strong 
> -Wformat -Werror=format-security -D_DEFAULT_SOURCE -D_XOPEN_SOURCE=600 
> -L/tmp/ncurses-6.2+20210828/obj-wide/lib -Wl,-z,relro -Wl,-z,now conftest.c 
> -lncursesw -ltinfo  >&5
> | configure:8519:10: fatal error: curses.h: No such file or directory
> | compilation terminated.

yes... that change which I made for _XOPEN_SOURCE would be exercised in this
part of the configure script.

> | configure:8533: $? = 1
> `----
> The problem is that -I/tmp/ncurses-6.2+20210828/obj-wide/include is
> missing from the gcc commandline, along with a few other options.
> Reverting test/aclocal.m4 to version 1.197 (and autoreconfing) fixes
> that.
> Any ideas?
> Cheers,
>        Sven
> 1. https://salsa.debian.org/joachim-guest/ncurses/-/jobs/1885640

Thomas E. Dickey <dickey@invisible-island.net>

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