[bug#65371] [PATCH telephony-team 06/10] gnu: Add sdbus-cpp.

[Maxim Cournoyer <maxim.cournoyer@gmail.com>]

* gnu/packages/glib.scm (sdbus-cpp): New variable.
* gnu/packages/patches/sdbus-c++-elogind.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register it.
---

 gnu/local.mk                                 |  1 +
 gnu/packages/glib.scm                        | 43 +++++++++++++
 gnu/packages/patches/sdbus-c++-elogind.patch | 63 ++++++++++++++++++++
 3 files changed, 107 insertions(+)
 create mode 100644 gnu/packages/patches/sdbus-c++-elogind.patch

diff --git a/gnu/local.mk b/gnu/local.mk
index abe8964f4d..de669c1177 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -1938,6 +1938,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/scons-test-environment.patch		\
   %D%/packages/patches/screen-hurd-path-max.patch		\
   %D%/packages/patches/scsh-nonstring-search-path.patch	\
+  %D%/packages/patches/sdbus-c++-elogind.patch			\
   %D%/packages/patches/sdl-libx11-1.6.patch			\
   %D%/packages/patches/seed-webkit.patch			\
   %D%/packages/patches/sendgmail-accept-ignored-gsuite-flag.patch	\
diff --git a/gnu/packages/glib.scm b/gnu/packages/glib.scm
index a0b85b15d1..588133e93f 100644
--- a/gnu/packages/glib.scm
+++ b/gnu/packages/glib.scm
@@ -1290,6 +1290,49 @@ (define-public dbus-cxx
     (home-page "https://dbus-cxx.github.io/")
     (license license:gpl3)))
 
+(define-public sdbus-c++
+  ;; Use the latest commit, which includes unreleased fixes to the pkg-config
+  ;; file.
+  (let ((commit "3e84b254e9603935cb5fc180c4d2214d7024ccbb")
+        (revision "0"))
+    (package
+      (name "sdbus-c++")
+      (version (git-version "1.2.0" revision commit))
+      (source (origin
+                (method git-fetch)
+                (uri (git-reference
+                      (url "https://github.com/Kistler-Group/sdbus-cpp")
+                      (commit commit)))
+                (file-name (git-file-name name version))
+                (sha256
+                 (base32
+                  "0xrcp49almi3kwzmwcwv8sayqjxx8m55s5grxarw2hl9jmghwlc3"))
+                (patches (search-patches "sdbus-c++-elogind.patch"))))
+      (build-system cmake-build-system)
+      (arguments
+       (list
+        ;; Avoid the integration test, which requires a system bus.
+        #:test-target "sdbus-c++-unit-tests"
+        #:configure-flags #~(list "-DBUILD_CODE_GEN=ON"
+                                  "-DBUILD_TESTS=ON"
+                                  ;; Do not install tests.
+                                  "-DTESTS_INSTALL_PATH=/tmp"
+                                  "-DCMAKE_VERBOSE_MAKEFILE=ON")
+        #:phases #~(modify-phases %standard-phases
+                     (add-after 'unpack 'do-not-install-tests
+                       (lambda _
+                         (substitute* "tests/CMakeLists.txt"
+                           (("/etc/dbus-1/system.d") "/tmp")))))))
+      (native-inputs (list googletest pkg-config))
+      (inputs (list expat))
+      (propagated-inputs (list elogind)) ;required by sdbus-c++.pc
+      (home-page "https://github.com/Kistler-Group/sdbus-cpp")
+      (synopsis "High-level C++ D-Bus library")
+      (description "@code{sdbus-c++} is a high-level C++ D-Bus library designed
+to provide easy-to-use yet powerful API in modern C++.  It adds another layer
+of abstraction on top of @code{sd-bus}, the C D-Bus implementation by systemd.")
+      (license license:lgpl2.1+))))
+
 (define-public appstream-glib
   (package
     (name "appstream-glib")
diff --git a/gnu/packages/patches/sdbus-c++-elogind.patch b/gnu/packages/patches/sdbus-c++-elogind.patch
new file mode 100644
index 0000000000..d01838edbc
--- /dev/null
+++ b/gnu/packages/patches/sdbus-c++-elogind.patch
@@ -0,0 +1,63 @@
+Submitted upstream: https://github.com/Kistler-Group/sdbus-cpp/pull/352
+
+From 8423c44b6c24ebd59db06ad33704265aa81a1c7a Mon Sep 17 00:00:00 2001
+From: Sven Eden <sven.eden@prydeworx.com>
+Date: Thu, 17 Aug 2023 23:16:19 -0400
+Subject: [PATCH] build: Add support for elogind.
+
+* CMakeLists.txt: Fallback to elogind when libsystemd could not be
+found.  Set LIBSYSTEMD variable.
+* pkgconfig/sdbus-c++.pc.in (Description): Parameterize with above
+LIBSYSTEMD variable.
+
+Signed-off-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>
+---
+ CMakeLists.txt            | 11 +++++++++++
+ pkgconfig/sdbus-c++.pc.in |  2 +-
+ 2 files changed, 12 insertions(+), 1 deletion(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 94f71c7..40c15f8 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -12,11 +12,22 @@ include(GNUInstallDirs) # Installation directories for `install` command and pkg
+ # PERFORMING CHECKS & PREPARING THE DEPENDENCIES
+ #-------------------------------
+ 
++set(LIBSYSTEMD "libsystemd")
++
+ option(BUILD_LIBSYSTEMD "Build libsystemd static library and incorporate it into libsdbus-c++" OFF)
+ 
+ if(NOT BUILD_LIBSYSTEMD)
+     find_package(PkgConfig REQUIRED)
+     pkg_check_modules(Systemd IMPORTED_TARGET GLOBAL libsystemd>=236)
++    if(NOT TARGET PkgConfig::Systemd)
++        message(WARNING "libsystemd not found, checking for libelogind instead")
++        pkg_check_modules(Systemd IMPORTED_TARGET GLOBAL libelogind>=236)
++        if(TARGET PkgConfig::Systemd)
++            set(LIBSYSTEMD "libelogind")
++            string(REPLACE "." ";" VERSION_LIST ${Systemd_VERSION})
++            list(GET VERSION_LIST 0 Systemd_VERSION)
++        endif()
++    endif()
+     if(NOT TARGET PkgConfig::Systemd)
+         message(FATAL_ERROR "libsystemd of version at least 236 is required, but was not found "
+                             "(if you have systemd in your OS, you may want to install package containing pkgconfig "
+diff --git a/pkgconfig/sdbus-c++.pc.in b/pkgconfig/sdbus-c++.pc.in
+index 6ad010a..0703476 100644
+--- a/pkgconfig/sdbus-c++.pc.in
++++ b/pkgconfig/sdbus-c++.pc.in
+@@ -5,7 +5,7 @@ includedir=@CMAKE_INSTALL_FULL_INCLUDEDIR@
+ 
+ Name: @PROJECT_NAME@
+ Description: C++ library on top of sd-bus, a systemd D-Bus library
+-Requires@PKGCONFIG_REQS@: libsystemd
++Requires@PKGCONFIG_REQS@: @LIBSYSTEMD@
+ Version: @SDBUSCPP_VERSION@
+ Libs: -L${libdir} -l@PROJECT_NAME@
+ Cflags: -I${includedir}
+
+base-commit: 3e84b254e9603935cb5fc180c4d2214d7024ccbb
+-- 
+2.41.0
+
-- 
2.41.0