[libcamera-devel] [RFC PATCH] meson: Set a SONAME version in the libcamera libraries

[Javier Martinez Canillas]

The libcamera and libcamera-base libraries are currently unversioned, but
donwstream users expect these to have a proper SONAME version in order to
package them.

A stable release has not yet happened because the project is still under
development and the API/ABI might change. But having a versioned SONAME
would allow distributions to package libcamera, without the need to add
any downstream patch to set the version.

Since the "0.0.0" version is already used in different places, let's also
that as the library version and use just "0" as the SONAME version. That
is aligned with the convention used by other projects:

$ ls /lib64/libcamera*so* -1
/lib64/libcamera-base.so
/lib64/libcamera-base.so.0.0.0
/lib64/libcamera.so
/lib64/libcamera.so.0
/lib64/libcamera.so.0.0.0

$ objdump -p /lib64/libcamera.so.0.0.0 | grep SONAME
  SONAME               libcamera.so.0

Signed-off-by: Javier Martinez Canillas <javierm at redhat.com>
---

 meson.build                    | 1 +
 src/libcamera/base/meson.build | 2 ++
 src/libcamera/meson.build      | 2 ++
 3 files changed, 5 insertions(+)

diff --git a/meson.build b/meson.build
index a49c484fe64..bf07f37a5f0 100644
--- a/meson.build
+++ b/meson.build
@@ -23,6 +23,7 @@ if libcamera_git_version == ''
 endif
 
 libcamera_version = libcamera_git_version.split('+')[0]
+libcamera_soversion = libcamera_version.split('.')[0]
 
 # Configure the build environment.
 cc = meson.get_compiler('c')
diff --git a/src/libcamera/base/meson.build b/src/libcamera/base/meson.build
index 8e125744d82..6b5049e5de5 100644
--- a/src/libcamera/base/meson.build
+++ b/src/libcamera/base/meson.build
@@ -29,6 +29,8 @@ libcamera_base_args = [ '-DLIBCAMERA_BASE_PRIVATE' ]
 
 libcamera_base_lib = shared_library('libcamera-base',
                                     [libcamera_base_sources, libcamera_base_headers],
+                                    version : libcamera_version,
+                                    soversion : libcamera_soversion,
                                     name_prefix : '',
                                     install : true,
                                     cpp_args : libcamera_base_args,
diff --git a/src/libcamera/meson.build b/src/libcamera/meson.build
index bf82d38be75..7b1a541a322 100644
--- a/src/libcamera/meson.build
+++ b/src/libcamera/meson.build
@@ -128,6 +128,8 @@ libcamera_deps = [
 
 libcamera = shared_library('libcamera',
                            libcamera_sources,
+                           version : libcamera_version,
+                           soversion : libcamera_soversion,
                            name_prefix : '',
                            install : true,
                            include_directories : includes,
-- 
2.31.1