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Subject:	Re: [ANNOUNCEMENT] Updated: curl 7.71.1-1
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Date:	Mon, 10 Aug 2020 15:14:16 -0400
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From:	Ken Brown via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Ken Brown <kbrown AT cornell DOT edu>
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--------------8BB46A093B1912C416D13201
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On 8/10/2020 1:33 PM, Brian Inglis wrote:
> On 2020-08-10 08:52, Ken Brown via Cygwin wrote:
>> On 8/9/2020 5:48 PM, Brian Inglis wrote:
>>> On 2020-08-09 12:28, Adam Dinwoodie wrote:
>>>> On Fri, 24 Jul 2020 at 13:56, Adam Dinwoodie wrote:
>>>>> In the failing case, the `/configure` stage includes the following
>>>>> text: `configure: Setting CURL_LDFLAGS to '-lcurl -lnghttp2 -lidn2
>>>>> -lssh -lpsl -lssl -lcrypto -lldap -llber -lbrotlidec -lbrotlidec
>>>>> -lz'`; in the working case using -7.66.0-1, the corresponding line =
is
>>>>> just `configure: Setting CURL_LDFLAGS to '-lcurl'`.
>> [...]
>>> Meanwhile, that info likely comes from:
>>>
>>> $ tail -vn15 /lib/pkgconfig/libcurl.pc
>>> =3D=3D> /lib/pkgconfig/libcurl.pc <=3D=3D
>>> #
>>> prefix=3D/usr
>>> exec_prefix=3D/usr
>>> libdir=3D${exec_prefix}/lib
>>> includedir=3D${prefix}/include
>>> supported_protocols=3D"DICT FILE FTP FTPS GOPHER HTTP HTTPS IMAP IMAP=
S LDAP LDAPS
>>> POP3 POP3S RTSP SCP SFTP SMB SMBS SMTP SMTPS TELNET TFTP"
>>> supported_features=3D"SSL IPv6 UnixSockets libz brotli AsynchDNS IDN =
PSL NTLM
>>> NTLM_WB TLS-SRP HTTP2 HTTPS-proxy"
>>>
>>> Name: libcurl
>>> URL: https://curl.haxx.se/
>>> Description: Library to transfer files with ftp, http, etc.
>>> Version: 7.71.1
>>> Libs: -L${libdir} -lcurl
>>> Libs.private: -lnghttp2 -lidn2 -lssh -lpsl -lssl -lcrypto -lldap -llb=
er
>>> -lbrotlidec -lbrotlidec -lz
>>> Cflags: -I${includedir}
>>>
>>> it looks like your git build should be using Libs for dynamic builds =
and adding
>>> Libs.private for static builds
>=20
>> If you look at configure.ac in the git sources, you'll see that it use=
s
>> curl-config, not pkg-config.=A0 The former reports:
>>
>> $ curl-config --libs
>> -lcurl -lnghttp2 -lidn2 -lssh -lpsl -lssl -lcrypto -lldap -llber -lbro=
tlidec
>> -lbrotlidec -lz
>>
>> Yaakov's build of earlier versions of curl used a patch 7.33.0-libdeps=
.patch to
>> prevent the unnecessary libs from being listed.=A0 He even had a comme=
nt at the
>> beginning of the patch, explaining the reason for it: "These are neede=
d only for
>> static linking, but we build with --disable-static".
>=20
> I try to avoid looking at autotools plumbing if I can possibly avoid it=
! ;^>
> Someone cleaned up the approach used, as the patch did not apply and wa=
s dropped.

My point is that the patch shouldn't have been dropped.  It should have b=
een=20
modified to apply to the updated sources.  (I've done this.  See the atta=
ched.)=20
As Yaakov wrote, the patch is needed to prevent 'curl-config --libs' from=
=20
including libs that are only needed for static linking.

With the modified patch applied, curl-config gives the expected result:

$ curl-config --libs
-lcurl

> If you look at my later post, cygport git build and tests worked for me=
 with no
> problems other than at first missing some package build dependencies

Those were not really build dependencies.  They only appeared to be neede=
d=20
because 'curl-config --libs' erroneously included libs that are only need=
ed for=20
static linking.

Ken

--------------8BB46A093B1912C416D13201
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 filename="7.71.1-libdeps.patch"

These are needed only for static linking, but we build with --disable-static

--- origsrc/curl-7.71.1/curl-config.in	2020-06-27 18:03:53.000000000 -0400
+++ src/curl-7.71.1/curl-config.in	2020-08-10 14:31:22.719684300 -0400
@@ -160,7 +160,7 @@ while test $# -gt 0; do
         else
            CURLLIBDIR=""
         fi
-        if test "X AT ENABLE_SHARED@" = "Xno" -o "X AT REQUIRE_LIB_DEPS@" = "Xyes"; then
+        if test "X AT ENABLE_SHARED@" = "Xno" -o "X AT REQUIRE_LIB_DEPS@" = "Xnothanks"; then
           echo ${CURLLIBDIR}-lcurl @LIBCURL_LIBS@
         else
           echo ${CURLLIBDIR}-lcurl
--- origsrc/curl-7.71.1/libcurl.pc.in	2020-06-27 18:03:53.000000000 -0400
+++ src/curl-7.71.1/libcurl.pc.in	2020-08-10 14:33:36.069651700 -0400
@@ -35,5 +35,4 @@ URL: https://curl.haxx.se/
 Description: Library to transfer files with ftp, http, etc.
 Version: @CURLVERSION@
 Libs: -L${libdir} -lcurl @LIBCURL_NO_SHARED@
-Libs.private: @LIBCURL_LIBS@
 Cflags: -I${includedir} @CPPFLAG_CURL_STATICLIB@

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