Debug builds optional with --debug-also config option.

* Makefile (PROG): Variable removed, now set in config.make.
(all): Target now depends on $(BUILD_TARGETS) variable, set
in config.make.

* configure (debug_also) New variable.
(gen_config_make): Generate PROG and BUILD_TARGETS variables.

1 files changed, 14 insertions, 0 deletions

diff --git a/configure b/configure
index a11c9c63..9bef1060 100755
--- a/configure
+++ b/configure
@@ -99,6 +99,7 @@ opt_flags=-O2
 lang_flags='-ansi -D_XOPEN_SOURCE=600'
 diag_flags='-Wall -Werror=implicit-function-declaration -Werror=missing-prototypes -Werror=strict-prototypes'
 debug_flags=-g
+debug_also=
 inline=
 platform_flags=
 remove_flags=
@@ -353,6 +354,13 @@ debug-flags [$debug_flags]
   Specifies flags for requesting that debugging information be
   retained in the compile and link.
 
+debug-also [$debug_also]
+
+  Specifies that a debugging version of TXR is to be built at the
+  same time. This means that "make" will always update two sets
+  of object files compiled with different optimization flags,
+  and produce two binaries: txr and txr-dbg.
+
 platform-flags [$platform_flags]
 
   Specify additional compiler flags for anything else, such as CPU tuning,
@@ -624,10 +632,16 @@ LEX := $lex
 YACC := $yacc
 NM := $nm
 
+PROG := txr
+
 OPT_FLAGS := $opt_flags
 LANG_FLAGS := $lang_flags
 DIAG_FLAGS := $diag_flags
 DBG_FLAGS := $debug_flags
+BUILD_TARGETS := $(if [ $debug_also ] ; then
+                     echo '$(PROG) $(PROG)-dbg'
+                   else
+                     echo '$(PROG)'; fi)
 PLATFORM_FLAGS := $platform_flags
 REMOVE_FLAGS := $remove_flags
 LEX_DBG_FLAGS := $lex_dbg_flags