[gimp/wip/smcv/relax-liblcms-version-check] app: Don't second-guess the dependency system

[Simon McVittie <smcv src gnome org>]

commit 12793d12f5a9d6347c238a50c13d15c94406ac5b
Author: Simon McVittie <smcv debian org>
Date:   Sat Apr 3 11:40:22 2021 +0100

    app: Don't second-guess the dependency system
    
    Removing this check makes the treatment of LittleCMS consistent with
    all the other dependencies checked in the same file, which only check
    that the runtime version is at least the required version.
    
    As long as we were compiled against LittleCMS >= 2.8, and are now
    running against a version that has at least the same symbols, it doesn't
    necessarily matter whether the version we are running against is the
    same one we were compiled against.
    
    Distributions like Debian and Ubuntu track the versions in which
    individual symbols were introduced, which allows runtime dependencies
    to be weakened when no newer symbols are actually used; this is
    practically necessary when working with very large numbers of packages,
    to avoid a new version of a dependency library unnecessarily blocking
    upgrade of dependent packages. However, this doesn't work if dependent
    packages add their own checks that bypass this mechanism.
    
    Signed-off-by: Simon McVittie <smcv debian org>

 app/sanity.c | 16 ----------------
 1 file changed, 16 deletions(-)
---
diff --git a/app/sanity.c b/app/sanity.c
index 694108983e..bca0d7f010 100644
--- a/app/sanity.c
+++ b/app/sanity.c
@@ -391,22 +391,6 @@ sanity_check_lcms (void)
 
   gint lcms_version = cmsGetEncodedCMMversion ();
 
-  if (LCMS_VERSION > lcms_version)
-    {
-      return g_strdup_printf
-        ("Liblcms2 version mismatch!\n\n"
-         "GIMP was compiled against LittleCMS version %d.%d, but the\n"
-         "LittleCMS version found at runtime is only %d.%d.\n\n"
-         "Somehow you or your software packager managed\n"
-         "to install a LittleCMS that is older than what GIMP was\n"
-         "built against.\n\n"
-         "Please make sure that the installed LittleCMS version\n"
-         "is at least %d.%d and that headers and library match.",
-         LCMS_VERSION / 1000, LCMS_VERSION % 1000 / 10,
-         lcms_version / 1000, lcms_version % 1000 / 10,
-         LCMS_VERSION / 1000, LCMS_VERSION % 1000 / 10);
-    }
-
   if (lcms_version < (LCMS_REQUIRED_MAJOR * 1000 +
                       LCMS_REQUIRED_MINOR * 10))
     {