Linphone

Linphone

[Raghav Gururajan]

Hello Folks!

For past week, I have been working on packaging Linphone. I have successfully packaged all the required dependencies, including liblinphone. Here is the whole diff of my project:

https://bin.disroot.org/?2526ad4c662035f3#DRxApUqk2XhFf23dH2EPAQ9Xeqn1DBE5dkCxeBxoQ8QB

For the final package, linphone-desktop, I am having some trouble. Here is the error I get:

https://bin.disroot.org/?f9419716e5815c6c#DEtwGGt2mSM4UuYnDn7pd4BHvD5KWNXTWMYaHUCvidvA

I tried (#configure-flags (list (string-append "-DBcToolbox_DIR=" (assoc-ref %build-inputs "bctoolbox")))). But it did not work.

Any thoughts please?

Regards,
RG.

Re: Linphone

[Ricardo Wurmus]

Hi,

> For past week, I have been working on packaging Linphone. I have
> successfully packaged all the required dependencies, including
> liblinphone. Here is the whole diff of my project:

Very nice!

> For the final package, linphone-desktop, I am having some trouble. Here is the error I get:
>
> https://bin.disroot.org/?f9419716e5815c6c#DEtwGGt2mSM4UuYnDn7pd4BHvD5KWNXTWMYaHUCvidvA
>
> I tried (#configure-flags (list (string-append "-DBcToolbox_DIR=" (assoc-ref %build-inputs "bctoolbox")))). But it did not work.

The error says

  By not providing "FindBcToolbox.cmake" in CMAKE_MODULE_PATH this project
  has asked CMake to find a package configuration file provided by
  "BcToolbox", but CMake did not find one.

So there is no FindBcToolbox.cmake file, which would tell CMake how to
find the package.  There also is no pkg-config file (a file ending on
.pc) — or perhaps there is but you are not using pkg-config.

Please try adding pkg-config to the native-inputs.

If this still doesn’t work check the output of bctoolbox: does it
install a pkg-config file?  If it does: does the file mention any
libraries that must be propagated?

--
Ricardo

Re: Linphone

[Maxim Cournoyer]

Hi!

Ricardo Wurmus <rekado@elephly.net> writes:

> Hi,
>
>> For past week, I have been working on packaging Linphone. I have
>> successfully packaged all the required dependencies, including
>> liblinphone. Here is the whole diff of my project:
>
> Very nice!
>
>> For the final package, linphone-desktop, I am having some trouble. Here is the error I get:
>>
>> https://bin.disroot.org/?f9419716e5815c6c#DEtwGGt2mSM4UuYnDn7pd4BHvD5KWNXTWMYaHUCvidvA
>>
>> I tried (#configure-flags (list (string-append "-DBcToolbox_DIR=" (assoc-ref %build-inputs "bctoolbox")))). But it did not work.
>
> The error says
>
>   By not providing "FindBcToolbox.cmake" in CMAKE_MODULE_PATH this project
>   has asked CMake to find a package configuration file provided by
>   "BcToolbox", but CMake did not find one.
>
> So there is no FindBcToolbox.cmake file, which would tell CMake how to
> find the package.  There also is no pkg-config file (a file ending on
> .pc) — or perhaps there is but you are not using pkg-config.
>
> Please try adding pkg-config to the native-inputs.
>
> If this still doesn’t work check the output of bctoolbox: does it
> install a pkg-config file?  If it does: does the file mention any
> libraries that must be propagated?

Did Ricardo's suggestion help? I'm interested in Linphone on Guix! The
more VoIP options we have on the table in the times we're in, the better
:-). If you have more issues, do reach out, and I'll see if I can lend a
hand.

Thank you for working on it!

Maxim

Re: Linphone

[Raghav Gururajan]

Hi Maxim!

> Did Ricardo's suggestion help? I'm interested in Linphone on Guix! The
> more VoIP options we have on the table in the times we're in, the better
> :-). If you have more issues, do reach out, and I'll see if I can lend a
> hand.

Danny's idea fixed it. It was a typo inside the source code.

Sure, I will keep you posted. I have started to send my Linphone patches (http://debbugs.gnu.org/cgi/bugreport.cgi?bug=40264). I will ping you if I gett stuck with something. :-)

> Thank you for working on it!

My pleasure :-)

Regards,
RG.

Re: Linphone

[Raghav Gururajan]

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Hi Maxim!

>> Did Ricardo's suggestion help? I'm interested in Linphone on Guix! The
>> more VoIP options we have on the table in the times we're in, the better
>> :-). If you have more issues, do reach out, and I'll see if I can lend a
>> hand.
> 
> Danny's idea fixed it. It was a typo inside the source code.
> 
> Sure, I will keep you posted. I have started to send my Linphone patches
> (http://debbugs.gnu.org/cgi/bugreport.cgi?bug=40264). I will ping you if I gett stuck with
> something. :-)

I ran into trouble with belle-sip. Would you be able to help with that? I have attached the package definition of belle-sip, along with libantlr3c patch, with this email.

Regards,
RG.

[-- Attachment #2: belle-sip.scm --]
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(define-public belle-sip
 (package
  (name "belle-sip")
   (version "1.6.3")
   (source
    (origin
     (method url-fetch)
     (uri
      (string-append "https://www.linphone.org/releases/sources/" name
                     "/" name "-" version ".tar.gz"))
     (sha256
      (base32 "0s55kggmgxap54dkw5856bgk4xg7yvbzialpxnjm0zhpic3hff1z"))))
 (build-system cmake-build-system)
 (arguments
  `(#:configure-flags
     (list
      "-DENABLE_SHARED=YES"
      "-DENABLE_STATIC=YES"
      "-DENABLE_RTP_MAP_ALWAYS_IN_SDP=ON"
      "-DENABLE_STRICT=YES"
      "-DENABLE_TUNNEL=OFF" ; Not available
      "-DENABLE_TESTS=ON")))
 (inputs
  `(("antlr3" ,antlr3-3.1)
    ("antlr3c" ,libantlr3c)
    ("threads" ,pth)
    ("java" ,icedtea)
    ("zlib" ,zlib)))
 (propagated-inputs
  `(("bctoolbox" ,bctoolbox)))
 (synopsis "Belledonne Communications SIP Library")
 (description "Belle-sip is a modern library implementing SIP transport,
transaction and dialog layers.  It is written in C, with an object-oriented
API.  It also comprises a simple HTTP/HTTPS client implementation.")
 (home-page "https://gitlab.linphone.org/BC/public/belle-sip")
 (license license:gpl3+)))

[-- Attachment #3: libantlr3c.patch --]
[-- Type: application/octet-stream, Size: 1514 bytes --]

From 791e2392aaa9a3202db90c1e50340c38bd001504 Mon Sep 17 00:00:00 2001
From: Raghav Gururajan <raghavgururajan@disroot.org>
Date: Sat, 28 Mar 2020 14:21:35 -0400
Subject: [PATCH 6/6] gnu: packages: java: Add libantlr3c

* gnu/packages/java.scm (libantlr3c): New variable.
---
 gnu/packages/java.scm | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/gnu/packages/java.scm b/gnu/packages/java.scm
index 5154dc124e..400ef8795e 100644
--- a/gnu/packages/java.scm
+++ b/gnu/packages/java.scm
@@ -105,6 +105,35 @@
 ;; build framework.  We then build the more recent JDKs Icedtea 2.x and
 ;; Icedtea 3.x.
 
+(define-public libantlr3c
+ (package
+  (name "libantlr3c")
+   (version "3.4")
+   (source
+    (origin
+     (method url-fetch)
+     (uri
+      (string-append "https://www.antlr3.org/download/C/"
+                     name "-" version ".tar.gz"))
+     (sha256
+      (base32 "0lpbnb4dq4azmsvlhp6khq1gy42kyqyjv8gww74g5lm2y6blm4fa"))))
+ (build-system gnu-build-system)
+ (arguments
+  `(#:configure-flags
+    (list
+     "--enable-debuginfo"
+     "--enable-64bit"
+     "--enable-abiflags"
+     "--enable-antlrdebug"
+     "--enable-shared"
+     "--enable-static"
+     "--enable-fast-install")))
+ (synopsis "ANTLR C Library")
+ (description "LIBANTLR3C provides run-time C libraries for ANTLR3
+(ANother Tool for Language Recognition v3).")
+ (home-page "https://www.antlr3.org/")
+ (license license:bsd-3)))
+
 (define jikes
   (package
     (name "jikes")
-- 
2.26.0

Re: Linphone

[Ricardo Wurmus]

Raghav Gururajan <raghavgururajan@disroot.org> writes:

> Hi Maxim!
>
>>> Did Ricardo's suggestion help? I'm interested in Linphone on Guix! The
>>> more VoIP options we have on the table in the times we're in, the better
>>> :-). If you have more issues, do reach out, and I'll see if I can lend a
>>> hand.
>>
>> Danny's idea fixed it. It was a typo inside the source code.
>>
>> Sure, I will keep you posted. I have started to send my Linphone patches
>> (http://debbugs.gnu.org/cgi/bugreport.cgi?bug=40264). I will ping you if I gett stuck with
>> something. :-)
>
> I ran into trouble with belle-sip. Would you be able to help with
> that? I have attached the package definition of belle-sip, along with
> libantlr3c patch, with this email.

You forgot to tell us what the trouble is.

--
Ricardo

Re: Linphone

[Raghav Gururajan]

Hi Ricardo!

>> Did Ricardo's suggestion help? I'm interested in Linphone on Guix! The
>> more VoIP options we have on the table in the times we're in, the better
>> :-). If you have more issues, do reach out, and I'll see if I can lend a
>> hand.
>>> Danny's idea fixed it. It was a typo inside the source code.
>>> 
>>> Sure, I will keep you posted. I have started to send my Linphone patches
>>> (http://debbugs.gnu.org/cgi/bugreport.cgi?bug=40264). I will ping you if I gett stuck with
>>> something. :-)
>> 
>> I ran into trouble with belle-sip. Would you be able to help with
>> that? I have attached the package definition of belle-sip, along with
>> libantlr3c patch, with this email.
> 
> You forgot to tell us what the trouble is.

Sorry about that, I was not sure how to describe what I saw. There was multiple red error messages during the build. They were related to some kind of parsing. Here is the build log https://bin.disroot.org/?8c6d055dbf3a35fe#CGYyfsJeSVA6NJTsqcVXiTf8jtHdbJhpJmTXwKeKFgTP

Regards,
RG.

Re: Linphone

[Raghav Gururajan]

Maxim and Ricardo!

>>> Did Ricardo's suggestion help? I'm interested in Linphone on Guix! The
>>> more VoIP options we have on the table in the times we're in, the better
>>> :-). If you have more issues, do reach out, and I'll see if I can lend a
>>> hand.
>> 
>> Danny's idea fixed it. It was a typo inside the source code.
>> 
>> Sure, I will keep you posted. I have started to send my Linphone patches
>> (http://debbugs.gnu.org/cgi/bugreport.cgi?bug=40264). I will ping you if I gett stuck with
>> something. :-)
>>> I ran into trouble with belle-sip. Would you be able to help with
>>> that? I have attached the package definition of belle-sip, along with
>>> libantlr3c patch, with this email.
>> 
>> You forgot to tell us what the trouble is.
> 
> Sorry about that, I was not sure how to describe what I saw. There was multiple red error messages
> during the build. They were related to some kind of parsing. Here is the build log
> https://bin.disroot.org/?8c6d055dbf3a35fe#CGYyfsJeSVA6NJTsqcVXiTf8jtHdbJhpJmTXwKeKFgTP

I fixed the issue. I had to make antlr3-3.3 variable public and use it. :-)

Regards,
RG.

Re: Linphone

[Raghav Gururajan]

Hello Guix!

I have finished packaging all the linphone project's packages. \o/

PATCH: https://issues.guix.gnu.org/issue/40264

SOURCE: https://cloud.disroot.org/f/94900047

There will be no new patches and only revision patches. :-)

Regards,
RG.

Re: Linphone

[Raghav Gururajan]

Hello Guix!

At this point for linphoneqt a.k.a linphone-desktop, I am facing following issues.


When I build *without* `-DENABLE_DBUS=YES`and run the program, I get:

QSocketNotifier: Socket notifiers cannot be enabled or disabled from another thread
QMutex: destroying locked mutex


When I build *with* `-DENABLE_DBUS=YES` and run the program, I get:

Segmentation Fault (Core Dumped)


I think the following patch is relevant, but when I use it, doesn't get successfully patched during the build.

https://gitlab.linphone.org/BC/public/linphone-desktop/commit/9cf08623e3092fa19366e5c07fbe06898a59f039.diff


Any ideas on how to fix this situation? Package definitions are available at https://issues.guix.gnu.org/issue/40264. Latest revision for this program is '14-add-linphoneqt-v3'.

Thank you!

Regards,
RG.

Re: Linphone

[Raghav Gururajan]

Hello Guix!

> At this point for linphoneqt a.k.a linphone-desktop, I am facing following issues.
> 
> When I build *without* `-DENABLE_DBUS=YES`and run the program, I get:
> 
> QSocketNotifier: Socket notifiers cannot be enabled or disabled from another thread
> QMutex: destroying locked mutex
> 
> When I build *with* `-DENABLE_DBUS=YES` and run the program, I get:
> 
> Segmentation Fault (Core Dumped)
> 
> I think the following patch is relevant, but when I use it, doesn't get successfully patched during
> the build.
> 
> https://gitlab.linphone.org/BC/public/linphone-desktop/commit/9cf08623e3092fa19366e5c07fbe06898a59f0
> 9.diff
> 
> Any ideas on how to fix this situation? Package definitions are available at
> https://issues.guix.gnu.org/issue/40264. Latest revision for this program is
> '14-add-linphoneqt-v3'.

So I fixed "QSocketNotifier" error in version 4 patch (14-add-linphoneqt-v4). I still don't know how to fix "QMutex" error.

Regards,
RG.

Re: Linphone

[Raghav Gururajan]

Hello Guix!

LINPHONE WORKS! \o/

Now we have a working client. It is a Legacy GTK version (linphone/liblinphone). I am still working on Qt version (linphoneqt/linphone-desktop).

Please test the client and let me know if there is any issue. The latest revision patch is "13-add-linphone-v3" at https://issues.guix.gnu.org/issue/40264.

Thank you!

Regards,
RG.

Re: Linphone

[Raghav Gururajan]

Hello Guix!

>> At this point for linphoneqt a.k.a linphone-desktop, I am facing following issues.
>> 
>> When I build *without* `-DENABLE_DBUS=YES`and run the program, I get:
>> 
>> QSocketNotifier: Socket notifiers cannot be enabled or disabled from another thread
>> QMutex: destroying locked mutex
>> 
>> When I build *with* `-DENABLE_DBUS=YES` and run the program, I get:
>> 
>> Segmentation Fault (Core Dumped)
>> 
>> I think the following patch is relevant, but when I use it, doesn't get successfully patched during
>> the build.
>> 
>> https://gitlab.linphone.org/BC/public/linphone-desktop/commit/9cf08623e3092fa19366e5c07fbe06898a59f0
>> 9.diff
>> 
>> Any ideas on how to fix this situation? Package definitions are available at
>> https://issues.guix.gnu.org/issue/40264. Latest revision for this program is
>> '14-add-linphoneqt-v3'.
> 
> So I fixed "QSocketNotifier" error in version 4 patch (14-add-linphoneqt-v4). I still don't know
> how to fix "QMutex" error.

I have now fixed "QMutex" error in the version 6 patch (14-add-linphoneqt-v6).

Regards,
RG.

Re: Linphone

[Danny Milosavljevic]

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Hi,

I tried

guix build -K linphone-desktop

then waited until it told me the build directory (which was
/tmp/guix-build-linux-libre-5.5.10.drv-0), then

$ which strace
<remember that name>
$ cd /tmp/guix-build-linux-libre-5.5.10.drv-0
$ source environment-variables
$ cd source
$ .....strace -f cmake . 2>&1 |grep -i bctoolbox |grep -i cmake
It says, among other things, that it can't open
/gnu/store/m92m6bg0xcl28djxg8h97sszf3gdl42r-bctoolbox-4.3.1/share/bctoolbox/cmake/BcToolboxConfig.cmake
.

So I checked that directory and it indeed does not have that file.

But it does have
/gnu/store/m92m6bg0xcl28djxg8h97sszf3gdl42r-bctoolbox-4.3.1/share/bctoolbox/cmake/bctoolboxConfig.cmake
-- note the different case of the name.

So I'd say either linphone-desktop or bctoolbox has the case wrong in some cmake file.

linphone-desktop has the following line:

./CMakeLists.txt:  include("${EP_bctoolbox_CONFIG_DIR}/BcToolboxConfig.cmake")

... and that line is not going to work as-is.

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Re: Linphone

[Danny Milosavljevic]

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Similar problem https://github.com/BelledonneCommunications/linphone-iphone/issues/399

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Re: Linphone

[Danny Milosavljevic]

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On Wed, 25 Mar 2020 23:29:50 +0100
Danny Milosavljevic <dannym@scratchpost.org> wrote:

> linphone-desktop has the following line:
> 
> ./CMakeLists.txt:  include("${EP_bctoolbox_CONFIG_DIR}/BcToolboxConfig.cmake")
> 
> ... and that line is not going to work as-is.

... and I checked ./cmake/BcToolboxConfig.cmake.in in bctoolbox and that does look okay.

But they have a renamer in CMakeLists.txt and that checks

set(EXPORT_TARGETS_NAME "bctoolbox")

So probably you could specify that one.  No idea why it exists and is different
from the original name.

It might make sense to ask them about it.

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Re: Linphone

[Raghav Gururajan]

Hi Danny!

> ... and I checked ./cmake/BcToolboxConfig.cmake.in in bctoolbox and that does look okay.
> 
> But they have a renamer in CMakeLists.txt and that checks
> 
> set(EXPORT_TARGETS_NAME "bctoolbox")
> 
> So probably you could specify that one. No idea why it exists and is different
> from the original name.

I see. How do I specify that in the package-definition of linnphone-desktop? I tried "-DEXPORT_TARGETS_NAME=bctoolbox" as configure-flag, but did not work.

Regards,
RG.

Re: Linphone

[Danny Milosavljevic]

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Hi Raghav,

I tried

    (arguments
     `(#:configure-flags
       (list "-DENABLE_DBUS=YES"
             "-DENABLE_UPDATE_CHECK=YES")
       #:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'patch
           (lambda _
             (substitute* "CMakeLists.txt"
              (("find_package[(]BcToolbox REQUIRED[)]")
               "find_package(bctoolbox REQUIRED)")
              (("find_package[(]Belcard REQUIRED[)]")
               "find_package(belcard REQUIRED)"))
             #t)))))

in linphone-desktop's package description and the error message changed.

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Re: Linphone

[Raghav Gururajan]

Hi Danny!

> I tried
> 
> (arguments
> `(#:configure-flags
> (list "-DENABLE_DBUS=YES"
> "-DENABLE_UPDATE_CHECK=YES")
> #:phases
> (modify-phases %standard-phases
> (add-after 'unpack 'patch
> (lambda _
> (substitute* "CMakeLists.txt"
> (("find_package[(]BcToolbox REQUIRED[)]")
> "find_package(bctoolbox REQUIRED)")
> (("find_package[(]Belcard REQUIRED[)]")
> "find_package(belcard REQUIRED)"))
> #t)))))
> 
> in linphone-desktop's package description and the error message changed.

Thanks so much. It did change the error :-).

Btw, when I was researching code base, I came across this technique. Will it be relevant?

                  ("BCTOOLBOX_INCLUDE_DIRS=-lbctoolbox"
                  ,(string-append "BCTOOLBOX_CFLAGS=-I"
                                  (assoc-ref %build-inputs "bctoolbox")
                                  "/include"))

Re: Linphone

[Raghav Gururajan]

So I was able to fix all the "Qt[...].cmake not found error by adding required inputs. But during build I get lot of errors related to Qt. I am not able to understand what those are. They all contain some king of flags.

Here is a new of my project. https://bin.disroot.org/?5c92968202a11fe5#5TrosGgDg5i5ZPve4VXr452wTrNHXaiHo146uc7gzZXP

Regards,
RG.

Re: Linphone

[Danny Milosavljevic]

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Hi Raghav,

> So I was able to fix all the "Qt[...].cmake not found error by adding required inputs. But during build I get lot of errors related to Qt. I am not able to understand what those are. They all contain some king of flags.

I don't know.  It sounds like the versions of the linphone modules are not compatible. 
Please ask upstream about it (for example file a bug report with them).

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Re: Linphone

[Raghav Gururajan]

Hi Danny!

> I don't know. It sounds like the versions of the linphone modules are not compatible.
> Please ask upstream about it (for example file a bug report with them).

It appears half of the errors were related to C++ standard. When I used ("gcc" ,gcc-5) as native-inputs, the number of errors, reduced to half.

Re: Linphone

[Raghav Gururajan]

So I was able to fix all the "Qt[...].cmake not found error by adding required inputs. But during build I get lot of errors related to Qt. I am not able to understand what those are.

BUILD LOG: https://bin.disroot.org/?79c1cc2131f7235f#HHS3xWeLCKd98L1fqZB6xEwnkPQWqyJXpoemhwppzRNV

NEW DIFF: https://bin.disroot.org/?5c92968202a11fe5#5TrosGgDg5i5ZPve4VXr452wTrNHXaiHo146uc7gzZXP

Re: Linphone

[Danny Milosavljevic]

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Hi Raghav,

I get a nondeterministic build failure in libdecaf:

cd /tmp/guix-build-libdecaf-1.0.drv-0/build/src/generator/curve25519 && /gnu/store/iaqmwj2290z5nnrk69bss6r0d9lpr8cs-python2-2.7.16/bin/python2.7 /tmp/guix-build-libdecaf-1.0.drv-0/source/src/generator/template.py --per=field --guard=p25519/f_field.h --item=p25519 -o /tmp/guix-build-libdecaf-1.0.drv-0/build/src/GENERATED/c/p25519/f_field.h /tmp/guix-build-libdecaf-1.0.drv-0/source/src/per_field/f_field.tmpl.h
Traceback (most recent call last):
  File "/tmp/guix-build-libdecaf-1.0.drv-0/source/src/generator/template.py", line 92, in <module>
    os.makedirs(os.path.dirname(outname))
  File "/gnu/store/iaqmwj2290z5nnrk69bss6r0d9lpr8cs-python2-2.7.16/lib/python2.7/os.py", line 157, in makedirs
    mkdir(name, mode)
OSError: [Errno 17] File exists: '/tmp/guix-build-libdecaf-1.0.drv-0/build/src/GENERATED/c/p25519'

It might not support parallel builds properly.

The next attempt did work (without changing anything).


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Re: Linphone

[Raghav Gururajan]

Hi Ricardo!
 
> Please try adding pkg-config to the native-inputs.

I tried it, but didn't work.

> If this still doesn’t work check the output of bctoolbox: does it
> install a pkg-config file? If it does: does the file mention any
> libraries that must be propagated?

I believe the build script doesn't use pkg-config. :/

Regards,
RG.

Re: Linphone

[Ricardo Wurmus]

Raghav Gururajan <raghavgururajan@disroot.org> writes:

> Hi Ricardo!
>  
>> Please try adding pkg-config to the native-inputs.
>
> I tried it, but didn't work.
>
>> If this still doesn’t work check the output of bctoolbox: does it
>> install a pkg-config file? If it does: does the file mention any
>> libraries that must be propagated?
>
> I believe the build script doesn't use pkg-config. :/

Does bctoolbox install a pc file?
Cmake often uses pkg-config for finding packages.

-- 
Ricardo

Re: Linphone

[Raghav Gururajan]

Hi Ricardo!

> Does bctoolbox install a pc file?

bctoolbox source tarball does have bctoolbox.pc.in file. But adding pkg-config as native-inputs for linphone-desktop did not work. Should I be doing adding something else?

Re: Linphone

[Raghav Gururajan]

Hi Danny!

> So I checked that directory and it indeed does not have that file.
> 
> But it does have
> /gnu/store/m92m6bg0xcl28djxg8h97sszf3gdl42r-bctoolbox-4.3.1/share/bctoolbox/cmake/bctoolboxConfig.cm
> ke
> -- note the different case of the name.

Thanks so much for spotting this.

> So I'd say either linphone-desktop or bctoolbox has the case wrong in some cmake file.

I believe it is linphone-desktop and not bctoolbox. Because other Belledone-Communications packages has bctoolboox as required dependency and they all work fine. So I think the issue is with linphone-desktop.

> linphone-desktop has the following line:
> 
> ./CMakeLists.txt: include("${EP_bctoolbox_CONFIG_DIR}/BcToolboxConfig.cmake")
> 
> ... and that line is not going to work as-is.

Yeah, that's true. Is there a way to patch this, with-in package definition? Could you help me with the syntax?

Thank you!

Regards,
RG.