pythongh-98636: Fix detecting gdbm_compat for _dbm module

mgorny · mgorny · commit 7f446f002ccc · 2022-12-18T05:43:49.000+01:00
Fix the gdbm_compat library detection logic to actually check for
-lgdbm_compat independently of the ndbm detection.  This fixes the build
failure with `--with-dbmliborder=gdbm`, and implicit fallback to ndbm
with the default value.
diff --git a/Misc/ACKS b/Misc/ACKS
@@ -640,6 +640,7 @@ Tiago Gonçalves
 Chris Gonnerman
 Shelley Gooch
 David Goodger
+Michał Górny
 Elliot Gorokhovsky
 Hans de Graaff
 Tim Graham
diff --git a/Misc/NEWS.d/next/Build/2022-10-25-11-53-55.gh-issue-98636.e0RPAr.rst b/Misc/NEWS.d/next/Build/2022-10-25-11-53-55.gh-issue-98636.e0RPAr.rst
@@ -0,0 +1,2 @@
+Fix a regression in detecting ``gdbm_compat`` library for the ``_gdbm``
+module build.
diff --git a/configure b/configure
diff --git a/configure.ac b/configure.ac
@@ -4147,9 +4147,7 @@ AS_VAR_IF([ac_cv_header_gdbm_dash_ndbm_h], [yes], [
 AS_UNSET([ac_cv_header_gdbm_ndbm_h])
 
 if test "$ac_cv_header_gdbm_slash_ndbm_h" = yes -o "$ac_cv_header_gdbm_dash_ndbm_h" = yes; then
-  WITH_SAVE_ENV([
-    AC_SEARCH_LIBS([dbm_open], [gdbm_compat])
-  ])
+  AC_CHECK_LIB(gdbm_compat, dbm_open, [have_gdbm_compat=yes], [have_gdbm_compat=no])
 fi
 
 # Check for libdb >= 5 with dbm_open()

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	+Fix a regression in detecting ``gdbm_compat`` library for the ``_gdbm``
	`2`	`+module build.`