$NetBSD: patch-auto.def,v 1.1 2022/09/20 17:13:24 nikita Exp $

Improve Berkeley DB detection, account for more flavours
Fixes #3525
upstream commited as c12b986765091933bdadbf3d0a341e66bd42404a

--- auto.def.orig	2022-04-29 14:15:32.000000000 +0200
+++ auto.def	2022-09-20 11:49:33.294171932 +0200
@@ -166,8 +166,8 @@
   # relative --enable-opt to true. This allows "--with-opt=/usr" to be used as
   # a shortcut for "--opt --with-opt=/usr".
   foreach opt {
-    bdb gdbm gnutls gpgme gss homespool idn idn2 kyotocabinet lmdb lua lz4 
-    mixmaster nls notmuch pcre2 qdbm rocksdb sasl sqlite ssl tdb tokyocabinet 
+    bdb gdbm gnutls gpgme gss homespool idn idn2 kyotocabinet lmdb lua lz4
+    mixmaster nls notmuch pcre2 qdbm rocksdb sasl sqlite ssl tdb tokyocabinet
     zlib zstd
   } {
     if {[opt-val with-$opt] ne {}} {
@@ -311,6 +311,7 @@
     lappend extensions -D_ALL_SOURCE=1
     lappend extensions -D_GNU_SOURCE=1
     lappend extensions -D__EXTENSIONS__
+    lappend extensions -D_XOPEN_SOURCE_EXTENDED
     define-append CFLAGS_FOR_BUILD {*}$extensions
     define-append CFLAGS {*}$extensions
   }
@@ -502,18 +503,17 @@
     msg-result $gpgme_version
     if {[get-define want-autocrypt]} {
       if {$gpgme_maj < 1 || $gpgme_min < 8} {
+        # GPGME v1.8.0 was released on 2016-11-16
         user-error "Found GPGME version $gpgme_version, need 1.8.0 for AutoCrypt"
       }
     } else {
       if {$gpgme_maj < 1 || $gpgme_min < 4} {
+        # GPGME v1.4.0 was released on 2013-02-26
         user-error "Found GPGME version $gpgme_version, need 1.4.0"
       }
     }
     define GPGME_VERSION_NUMBER [format "0x%02x%02x%02x" $gpgme_maj $gpgme_min $gpgme_patch]
 
-    # RHEL6 doesn't have this function yet
-    cc-check-function-in-lib gpgme_op_export_keys gpgme
-
     # CFLAGS
     if {[catch {exec-with-stderr $gpgme_config --cflags} res err]} {
       user-error "Could not derive --cflags from $gpgme_config"
@@ -945,28 +941,16 @@
 ###############################################################################
 # Header cache - bdb
 if {[get-define want-bdb]} {
-  set bdb_versions [opt-val with-bdb-version { 5.3 6.2 4.8 }] ;# Will be checked in order
-  set bdb_prefix [opt-val with-bdb $prefix]
-
-  foreach ver $bdb_versions {
-    lassign [split $ver .] maj min
-    # This is ugly, but it allows us to not have an inner loop
-    lappend bdb_majors   $maj $maj         $maj           $maj        $maj    $maj
-    lappend bdb_minors   $min $min         $min           $min        $min    $min
-    lappend bdb_exploded ""   db-$maj-$min db${maj}${min} db$maj.$min db-$maj db$maj
-  }
-
-  foreach maj $bdb_majors min $bdb_minors ver $bdb_exploded {
-    set ver_inc_dir $bdb_prefix/include/$ver
-    set ver_lib_dir $bdb_prefix/$::libdir_tail/$ver
+  proc find_bdb {bdb_prefix maj min path_tail lib_names} {
+    set ver_inc_dir $bdb_prefix/include/$path_tail
+    set ver_lib_dir $bdb_prefix/$::libdir_tail/$path_tail
     set ver_inc_file $ver_inc_dir/db.h
-    set ver_lib_file  db-$maj.$min
 
     # File exists?
     msg-checking "Checking for BerkeleyDB in $ver_inc_dir..."
     if {![file exists $ver_inc_file]} {
       msg-result "no"
-      continue
+      return 0
     }
 
     # Version is coherent?
@@ -975,23 +959,44 @@
     if {$inc_maj eq {}   || $inc_min eq {} ||
         $inc_maj != $maj || $inc_min != $min} {
       msg-result "no (expecting $maj.$min, got $inc_maj.$inc_min)"
-      continue
+      return 0
     }
     msg-result "yes"
 
     # Can link?
-    cc-with [list -libs -L$ver_lib_dir -cflags -I$ver_inc_dir] {
-      if {![check-inc-and-lib bdb {} db.h db_env_create db-$maj.$min]} {
-        msg-result "no"
-        continue
+    foreach lib_name $lib_names {
+      cc-with [list -libs -L$ver_lib_dir -cflags -I$ver_inc_dir] {
+        check-inc-and-lib bdb {} db.h db_env_create $lib_name
+      }
+      if {[have-feature bdb]} {
+        define-append CFLAGS  -I$ver_inc_dir
+        define-append LDFLAGS -L$ver_lib_dir
+        define-append LIBS    -l$lib_name
+        define-append HCACHE_BACKENDS "bdb"
+        define USE_HCACHE
+        return 1
+      }
+    }
+    return 0
+  }
+
+  set bdb_versions [opt-val with-bdb-version { 5.3 6.2 4.8 }] ;# Will be checked in order
+  set bdb_prefix [opt-val with-bdb $prefix]
+
+  foreach ver $bdb_versions {
+    if {[have-feature bdb]} {
+      break
+    }
+    lassign [split $ver .] maj min
+    foreach path_tail [list "" db-$maj-$min db${maj}${min} db$maj.$min db-$maj db$maj] {
+      if {[have-feature bdb]} {
+        break
+      }
+      set lib_names [list db$maj-$maj.$min db$maj-$maj db-$maj.$min db-$maj]
+      if {[find_bdb $bdb_prefix $maj $min $path_tail $lib_names]} {
+        break
       }
     }
-    define-append CFLAGS  -I$ver_inc_dir
-    define-append LDFLAGS -L$ver_lib_dir
-    define-append LIBS    -ldb-$maj.$min
-    define-append HCACHE_BACKENDS "bdb"
-    define USE_HCACHE
-    break
   }
 
   if {![have-feature bdb]} {