Description: add configure option to re-generate 'codes' unconditionally
 We want to create all files from their source
Author: Damyan Ivanov <dmn@debian.org>
Forwarded: https://github.com/FirebirdSQL/firebird/pull/6961

--- a/builds/posix/Makefile.in
+++ b/builds/posix/Makefile.in
@@ -295,7 +295,7 @@ master_process:
 # even if gpre itself was not rebuilt
 	-$(RM) $(GPRE_CURRENT)
 	(cd $(BIN); $(LN) $(notdir $(GPRE)) $(notdir $(GPRE_CURRENT)))
-ifeq ($(IsDeveloper), Y)
+ifeq ($(RegenCodes),Y)
 # In developer mode we must regenerate various files in include/gen
 	$(MAKE) codes
 endif
--- a/builds/posix/make.defaults
+++ b/builds/posix/make.defaults
@@ -109,6 +109,11 @@ PLUSPLUS_FLAGS:= -fno-rtti -std=c++17
 # If this is defined then we use special rules useful for developers only
 IsDeveloper = @DEVEL_FLG@
 
+RegenCodes = @REGEN_CODES_FLG@
+ifeq ($(IsDeveloper),Y)
+RegenCodes := Y
+endif
+
 CpuType=@CPU_TYPE@
 PLATFORM=@PLATFORM@
 TZDATA_ZIP=@TZDATA_ZIP@
--- a/configure.ac
+++ b/configure.ac
@@ -598,6 +598,16 @@ AC_ARG_ENABLE(developer,
    esac])
 AC_SUBST(DEVEL_FLG)
 
+REGEN_CODES_FLG=$DEVEL_FLG
+AC_ARG_ENABLE(regen-codes,
+  [  --enable-regen-codes    re-generate codes (default same as --enable developer)],
+  [case "$enableval" in
+     yes) REGEN_CODES_FLG=Y;;
+     no)  REGEN_CODES_FLG=N;;
+     *)   AC_MSG_ERROR(bad value '${enableval}' for --enable-regen-codes);;
+   esac])
+AC_SUBST(REGEN_CODES_FLG)
+
 CROSS=
 IS_CROSS=N
 AC_ARG_WITH(cross-build,