GNU bug report logs - #61278
improve diagnostics for LDFLAGS used on static archives

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Package: automake; Severity: minor; Reported by: Reuben Thomas <rrt@HIDDEN>; dated Sat, 4 Feb 2023 18:28:02 UTC; Maintainer for automake is bug-automake@HIDDEN.
Severity set to 'minor' from 'normal' Request was from Mike Frysinger <vapier@HIDDEN> to control <at> debbugs.gnu.org. Full text available.
Changed bug title to 'improve diagnostics for LDFLAGS used on static archives' from 'Automake warns about LDFLAGS for defined library' Request was from Mike Frysinger <vapier@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

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From: Reuben Thomas <rrt@HIDDEN>
Date: Sun, 5 Feb 2023 06:37:52 +0000
Message-ID: <CAOnWdoj56vkpnOPU8YuSZV7XCJ06watdW0tEDe3F1_t0s282pA@HIDDEN>
Subject: Re: bug#61278: Automake warns about LDFLAGS for defined library
To: Nick Bowler <nbowler@HIDDEN>
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On Sun, 5 Feb 2023 at 06:09, Nick Bowler <nbowler@HIDDEN> wrote:

>
> What Automake is trying to tell you is that LDFLAGS is meaningless
> on a static library.  This message could definitely be improved!
>

Of course, thanks! I was confused because  in another Makefile.am that had
only a static library I did not get this message, but I did not set LDFLAGS
there.

-- 
https://rrt.sc3d.org

--00000000000018eb1605f3ee281a
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Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail=
_attr">On Sun, 5 Feb 2023 at 06:09, Nick Bowler &lt;<a href=3D"mailto:nbowl=
er@HIDDEN">nbowler@HIDDEN</a>&gt; wrote:<br></div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex"><br>
What Automake is trying to tell you is that LDFLAGS is meaningless<br>
on a static library.=C2=A0 This message could definitely be improved!<br></=
blockquote><div><br></div><div style=3D"font-family:arial,helvetica,sans-se=
rif;font-size:small" class=3D"gmail_default">Of course, thanks! I was confu=
sed because=C2=A0 in another Makefile.am that had only a static library I d=
id not get this message, but I did not set LDFLAGS there.<br></div></div><b=
r>-- <br><div dir=3D"ltr" class=3D"gmail_signature"><div dir=3D"ltr"><div><=
div dir=3D"ltr"><a href=3D"https://rrt.sc3d.org" target=3D"_blank">https://=
rrt.sc3d.org</a></div></div></div></div></div>

--00000000000018eb1605f3ee281a--
Information forwarded to bug-automake@HIDDEN:
bug#61278; Package automake. Full text available.

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Subject: Re: bug#61278: Automake warns about LDFLAGS for defined library
To: Reuben Thomas <rrt@HIDDEN>
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 Content preview:  On 2023-02-04, Reuben Thomas via Bug reports for Automake
 <bug-automake@HIDDEN> wrote: > When automake is run,
 it warns: > > liba2ps/Makefile.am:63:
 warning: variable 'libnowarnings_a_LDFLAGS' is > d [...] 
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 Content preview:  On 2023-02-04, Reuben Thomas via Bug reports for Automake
   <bug-automake@HIDDEN> wrote: > When automake is run, it warns: > > liba2ps/Makefile.am:63:
    warning: variable 'libnowarnings_a_LDFLAGS' is > d [...] 
 
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On 2023-02-04, Reuben Thomas via Bug reports for Automake
<bug-automake@HIDDEN> wrote:
> When automake is run, it warns:
>
> liba2ps/Makefile.am:63: warning: variable 'libnowarnings_a_LDFLAGS' is
> defined but no program or
> liba2ps/Makefile.am:63: library has 'libnowarnings_a' as canonical name
> (possible typo)
>
> I don't understand this, because libnowarnings.a is defined as the
> canonical name of a library.

Indeed, this message does not seem very accurate.

What Automake is trying to tell you is that LDFLAGS is meaningless
on a static library.  This message could definitely be improved!

> If in the first Makefile.am I change the convenience library
> "libnowarnings.a" to a libtool library "libnowarnings.la", and add it
> to noinst_LTLIBRARIES, and rename the other variables accordingly,
> then again I get no warnings.

Unlike with a static library, LDFLAGS is used with libtool libraries, so
it is good that there is no warning.

Cheers,
  Nick
Information forwarded to bug-automake@HIDDEN:
bug#61278; Package automake. Full text available.

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--000000000000ae7c2905f3e3f4fc
Content-Type: text/plain; charset="UTF-8"

Using automake 1.16.5, in my Makefile.am, I have the following lines:

noinst_LTLIBRARIES = liba2ps.la
liba2ps_la_LDFLAGS = $(LIBGC_LIBS)
liba2ps_la_SOURCES = $(liba2pssources) $(libitsources) $(mylibitsources)
liba2ps_la_LIBADD = ../lib/libgnu.la $(LIBINTL) $(LIBSOCKET)
$(GETHOSTNAME_LIB)

noinst_LIBRARIES = libnowarnings.a
libnowarnings_a_CFLAGS = $(LIBGC_FLAGS)
libnowarnings_a_LDFLAGS = $(LIBGC_LIBS)
libnowarnings_a_SOURCES = fonts.l lexppd.l parseppd.y regex.c regex.h
confg.c confg.h

(This is from GNU a2ps <https://savannah.gnu.org/projects/a2ps>'s
liba2ps/Makefile.am.)

When automake is run, it warns:

liba2ps/Makefile.am:63: warning: variable 'libnowarnings_a_LDFLAGS' is
defined but no program or
liba2ps/Makefile.am:63: library has 'libnowarnings_a' as canonical name
(possible typo)

I don't understand this, because libnowarnings.a is defined as the
canonical name of a library.

In src/Makfile.am, I have the following lines:

noinst_LIBRARIES = libparse.a
libparse_a_SOURCES = parsessh.y lexssh.l lexps.l sheets-map.l
libparse_a_CFLAGS = $(LIBGC_FLAGS)

and I get no warnings. I have no LTLIBRARIES in this Makefile.am.

If in the first Makefile.am I change the convenience library
"libnowarnings.a" to a libtool library "libnowarnings.la", and add it to
noinst_LTLIBRARIES, and rename the other variables accordingly, then again
I get no warnings.

-- 
https://rrt.sc3d.org

--000000000000ae7c2905f3e3f4fc
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Using automake 1.16.5, in my Makefile.a=
m, I have the following lines:</div><div class=3D"gmail_default" style=3D"f=
ont-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small">noinst_LTLIBRARIES =3D <a href=3D"http://liba2ps.la">liba2ps.la</a=
><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetic=
a,sans-serif;font-size:small">liba2ps_la_LDFLAGS =3D $(LIBGC_LIBS)<br>liba2=
ps_la_SOURCES =3D $(liba2pssources) $(libitsources) $(mylibitsources)<br>li=
ba2ps_la_LIBADD =3D ../lib/<a href=3D"http://libgnu.la">libgnu.la</a> $(LIB=
INTL) $(LIBSOCKET) $(GETHOSTNAME_LIB)</div><div class=3D"gmail_default" sty=
le=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><di=
v class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;f=
ont-size:small">noinst_LIBRARIES =3D libnowarnings.a</div><div class=3D"gma=
il_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small=
">libnowarnings_a_CFLAGS =3D $(LIBGC_FLAGS)<br>libnowarnings_a_LDFLAGS =3D =
$(LIBGC_LIBS)<br>libnowarnings_a_SOURCES =3D fonts.l lexppd.l parseppd.y re=
gex.c regex.h confg.c confg.h</div><div class=3D"gmail_default" style=3D"fo=
nt-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small">(This is from <a href=3D"https://savannah.gnu.org/projects/a2ps">G=
NU a2ps</a>&#39;s liba2ps/Makefile.am.)</div><div class=3D"gmail_default" s=
tyle=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><=
div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif=
;font-size:small">When automake is run, it warns:</div><div class=3D"gmail_=
default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><=
br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,=
sans-serif;font-size:small">liba2ps/Makefile.am:63: warning: variable &#39;=
libnowarnings_a_LDFLAGS&#39; is defined but no program or<br>liba2ps/Makefi=
le.am:63: library has &#39;libnowarnings_a&#39; as canonical name (possible=
 typo)</div><div class=3D"gmail_default" style=3D"font-family:arial,helveti=
ca,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">I don&#39;t und=
erstand this, because libnowarnings.a is defined as the canonical name of a=
 library.</div><div class=3D"gmail_default" style=3D"font-family:arial,helv=
etica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" st=
yle=3D"font-family:arial,helvetica,sans-serif;font-size:small">In src/Makfi=
le.am, I have the following lines:</div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div =
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fon=
t-size:small">noinst_LIBRARIES =3D libparse.a<br>libparse_a_SOURCES =3D par=
sessh.y lexssh.l lexps.l sheets-map.l<br>libparse_a_CFLAGS =3D $(LIBGC_FLAG=
S)<br></div><div><br></div><div><div style=3D"font-family:arial,helvetica,s=
ans-serif;font-size:small" class=3D"gmail_default">and I get no warnings. I=
 have no LTLIBRARIES in this Makefile.am.</div><div style=3D"font-family:ar=
ial,helvetica,sans-serif;font-size:small" class=3D"gmail_default"><br></div=
><div style=3D"font-family:arial,helvetica,sans-serif;font-size:small" clas=
s=3D"gmail_default">If in the first Makefile.am I change the convenience li=
brary &quot;libnowarnings.a&quot; to a libtool library &quot;<a href=3D"htt=
p://libnowarnings.la">libnowarnings.la</a>&quot;, and add it to noinst_LTLI=
BRARIES, and rename the other variables accordingly, then again I get no wa=
rnings.<br></div><br></div>-- <br><div dir=3D"ltr" class=3D"gmail_signature=
" data-smartmail=3D"gmail_signature"><div dir=3D"ltr"><div><div dir=3D"ltr"=
><a href=3D"https://rrt.sc3d.org" target=3D"_blank">https://rrt.sc3d.org</a=
></div></div></div></div></div>

--000000000000ae7c2905f3e3f4fc--
Acknowledgement sent to Reuben Thomas <rrt@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-automake@HIDDEN. Full text available.
Report forwarded to bug-automake@HIDDEN:
bug#61278; Package automake. Full text available.
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