gh-35830: Bliss spkg config

    
Provide spkg-config for bliss, with minimal version 0.77.

Depends on #35344, where Sage's bliss is bumped to 0.77
with the necessary API changes.

Fixes #35829
    
URL: #35830
Reported by: Dima Pasechnik
Reviewer(s): Dima Pasechnik, Matthias Köppe

build/pkgs/bliss/SPKG.rst

@@ -23,8 +23,3 @@ https://users.aalto.fi/~tjunttil/bliss/index.html
 Bliss used to be maintained by Tommi Junttila and Petteri Kaski up to version 0.73 at
 
 http://www.tcs.tkk.fi/Software/bliss/index.html
-
-Dependencies
-------------
-
-None

build/pkgs/bliss/distros/alpine.txt

@@ -0,0 +1 @@
+bliss

build/pkgs/bliss/distros/fedora.txt

@@ -0,0 +1,2 @@
+bliss
+bliss-devel

build/pkgs/bliss/spkg-configure.m4

@@ -0,0 +1,27 @@
+SAGE_SPKG_CONFIGURE([bliss], [
+    m4_pushdef([SAGE_BLISS_MINVER],[0.77])
+    m4_pushdef([SAGE_BLISS_MAJOR],[0])
+    m4_pushdef([SAGE_BLISS_MINOR],[77])
+    AC_CHECK_HEADER([bliss/bliss_C.h], [
+           AC_SEARCH_LIBS([bliss_new], [bliss], [
+             AC_MSG_CHECKING([checking bliss version directly])
+             AC_RUN_IFELSE([AC_LANG_PROGRAM([
+                      [#include <bliss/defs.hh>
+                      ]],[[
+                       if (BLISS_VERSION_MAJOR > ]] SAGE_BLISS_MAJOR [[ ) return 0;
+                       if (BLISS_VERSION_MAJOR == ]] SAGE_BLISS_MAJOR [[  &&
+                           BLISS_VERSION_MINOR >= ]] SAGE_BLISS_MINOR [[ ) return 0;
+                       else return 1;
+                      ]])],
+                     [AC_MSG_RESULT([Good.])],
+                     [AC_MSG_RESULT([Too old.])
+                      sage_spkg_install_bliss=yes],
+                     []) dnl cross-compilation - noop
+           ],
+              [sage_spkg_install_bliss=yes])
+    ], [sage_spkg_install_bliss=yes])
+    m4_popdef([SAGE_BLISS_MINVER])
+    m4_popdef([SAGE_BLISS_MAJOR])
+    m4_popdef([SAGE_BLISS_MINOR])
+])
+