libphobos: Add --enable-libphobos-checking configure option

As GDCFLAGS is overriden by the top-level make file with '-O2 -g',
libphobos ends up always being built with all contracts, invariants, and
asserts compiled in.  This adds a new configurable that defaults to omit
compiling any run-time checks into the library using '-frelease'.

Other choices either set the flags '-fno-release', enabling all run-time
checks, or '-fassert', which only compiles in asserts.

The omission of compiling in contracts results in a smaller library
size, with faster build times.

libphobos/ChangeLog:

	PR d/94305
	* Makefile.in: Regenerate.
	* configure: Regenerate.
	* configure.ac: Add --enable-libphobos-checking and substitute
	CHECKING_DFLAGS.  Remove -frelease from GDCFLAGS.
	* libdruntime/Makefile.am: Add CHECKING_DFLAGS to AM_DFLAGS.
	* libdruntime/Makefile.in: Regenerate.
	* src/Makefile.am: Add CHECKING_DFLAGS to AM_DFLAGS.
	* src/Makefile.in: Regenerate.
	* testsuite/Makefile.in: Regenerate.
	* testsuite/testsuite_flags.in: Add -fno-release -funittest to
	--gdcflags.

10 files changed, 87 insertions, 11 deletions

diff --git a/libphobos/ChangeLog b/libphobos/ChangeLog
index d8d37ef1c2b..5b9fe432bb9 100644
--- a/libphobos/ChangeLog
+++ b/libphobos/ChangeLog
@@ -1,5 +1,20 @@
 2020-04-09  Iain Buclaw  <ibuclaw@gdcproject.org>
 
+	PR d/94305
+	* Makefile.in: Regenerate.
+	* configure: Regenerate.
+	* configure.ac: Add --enable-libphobos-checking and substitute
+	CHECKING_DFLAGS.  Remove -frelease from GDCFLAGS.
+	* libdruntime/Makefile.am: Add CHECKING_DFLAGS to AM_DFLAGS.
+	* libdruntime/Makefile.in: Regenerate.
+	* src/Makefile.am: Add CHECKING_DFLAGS to AM_DFLAGS.
+	* src/Makefile.in: Regenerate.
+	* testsuite/Makefile.in: Regenerate.
+	* testsuite/testsuite_flags.in: Add -fno-release -funittest to
+	--gdcflags.
+
+2020-04-09  Iain Buclaw  <ibuclaw@gdcproject.org>
+
 	* configure: Regenerate.
 	* configure.ac: Use AC_SEARCH_LIBS for pthread_create.
 	* m4/druntime/libraries.m4: Remove DRUNTIME_LIBRARIES_THREAD.
diff --git a/libphobos/Makefile.in b/libphobos/Makefile.in
index 98d35641a95..b464d605232 100644
--- a/libphobos/Makefile.in
+++ b/libphobos/Makefile.in
@@ -207,6 +207,7 @@ CCASFLAGS = @CCASFLAGS@
 CC_FOR_BUILD = @CC_FOR_BUILD@
 CFLAGS = @CFLAGS@
 CFLAGS_FOR_BUILD = @CFLAGS_FOR_BUILD@
+CHECKING_DFLAGS = @CHECKING_DFLAGS@
 CPP = @CPP@
 CPPFLAGS = @CPPFLAGS@
 CYGPATH_W = @CYGPATH_W@
diff --git a/libphobos/configure b/libphobos/configure
index f458ad3b086..af597b2525b 100755
--- a/libphobos/configure
+++ b/libphobos/configure
@@ -637,6 +637,7 @@ WARN_DFLAGS
 GDCFLAGSX
 libtool_VERSION
 SPEC_PHOBOS_DEPS
+CHECKING_DFLAGS
 ENABLE_LIBPHOBOS_FALSE
 ENABLE_LIBPHOBOS_TRUE
 gdc_include_dir
@@ -842,6 +843,7 @@ with_cross_host
 enable_version_specific_runtime_libs
 with_toolexeclibdir
 enable_libphobos
+enable_libphobos_checking
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1488,6 +1490,11 @@ Optional Features:
                           Specify that runtime libraries should be installed
                           in a compiler-specific directory
   --enable-libphobos      Enable libphobos
+  --enable-libphobos-checking[=LIST]
+                          enable expensive run-time checks. With LIST, enable
+                          only specific categories of checks. Categories are:
+                          yes,no,all,none,release. Flags are: assert or other
+                          strings
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11642,7 +11649,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11645 "configure"
+#line 11652 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11748,7 +11755,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11751 "configure"
+#line 11758 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -15288,6 +15295,31 @@ else
 fi
 
 
+# Enable expensive internal checks
+# Check whether --enable-libphobos-checking was given.
+if test "${enable_libphobos_checking+set}" = set; then :
+  enableval=$enable_libphobos_checking; ac_checking_flags="${enableval}"
+else
+  ac_checking_flags=release
+fi
+
+IFS="${IFS= 	}"; ac_save_IFS="$IFS"; IFS="$IFS,"
+for check in release $ac_checking_flags
+do
+	case $check in
+	# These set all the flags to specific states
+	yes|all) RELEASE_FLAG="-fno-release" ; ASSERT_FLAG= ;;
+	no|none|release) RELEASE_FLAG="-frelease" ; ASSERT_FLAG= ;;
+	# These enable particular checks
+	assert) ASSERT_FLAG="-fassert" ;;
+	# Accept
+	*) ;;
+	esac
+done
+IFS="$ac_save_IFS"
+CHECKING_DFLAGS="$RELEASE_FLAG $ASSERT_FLAG"
+
+
 # Add drtbegin.o/drtend.o to startfile/endfile specs in libgphobos.spec
 if test "$DCFG_MINFO_BRACKETING" = "false"; then
     DRTSTUFF_SPEC=$srcdir/src/drtstuff.spec
@@ -15306,12 +15338,12 @@ libtool_VERSION=1:0:0
 
 # Set default flags (after DRUNTIME_WERROR!)
 if test -z "$GDCFLAGS"; then
-    GDCFLAGS="-g -frelease -O2"
+    GDCFLAGS="-g -O2"
 fi
 
 
 if test -z "$GDCFLAGSX"; then
-    GDCFLAGSX="-g -fno-release -funittest"
+    GDCFLAGSX="-g"
 fi
 
 
diff --git a/libphobos/configure.ac b/libphobos/configure.ac
index e6148f07519..ffd12981d0b 100644
--- a/libphobos/configure.ac
+++ b/libphobos/configure.ac
@@ -187,6 +187,31 @@ yes:*) use_libphobos=yes ;;
 esac
 AM_CONDITIONAL(ENABLE_LIBPHOBOS, test x$use_libphobos = xyes)
 
+# Enable expensive internal checks
+AC_ARG_ENABLE(libphobos-checking,
+[AS_HELP_STRING([[--enable-libphobos-checking[=LIST]]],
+		[enable expensive run-time checks.  With LIST,
+		 enable only specific categories of checks.
+		 Categories are: yes,no,all,none,release.
+		 Flags are: assert or other strings])],
+[ac_checking_flags="${enableval}"],[ac_checking_flags=release])
+IFS="${IFS= 	}"; ac_save_IFS="$IFS"; IFS="$IFS,"
+for check in release $ac_checking_flags
+do
+	case $check in
+	# These set all the flags to specific states
+	yes|all) RELEASE_FLAG="-fno-release" ; ASSERT_FLAG= ;;
+	no|none|release) RELEASE_FLAG="-frelease" ; ASSERT_FLAG= ;;
+	# These enable particular checks
+	assert) ASSERT_FLAG="-fassert" ;;
+	# Accept
+	*) ;;
+	esac
+done
+IFS="$ac_save_IFS"
+CHECKING_DFLAGS="$RELEASE_FLAG $ASSERT_FLAG"
+AC_SUBST(CHECKING_DFLAGS)
+
 # Add drtbegin.o/drtend.o to startfile/endfile specs in libgphobos.spec
 if test "$DCFG_MINFO_BRACKETING" = "false"; then
     DRTSTUFF_SPEC=$srcdir/src/drtstuff.spec
@@ -205,12 +230,12 @@ AC_SUBST(libtool_VERSION)
 
 # Set default flags (after DRUNTIME_WERROR!)
 if test -z "$GDCFLAGS"; then
-    GDCFLAGS="-g -frelease -O2"
+    GDCFLAGS="-g -O2"
 fi
 AC_SUBST(GDCFLAGS)
 
 if test -z "$GDCFLAGSX"; then
-    GDCFLAGSX="-g -fno-release -funittest"
+    GDCFLAGSX="-g"
 fi
 AC_SUBST(GDCFLAGSX)
 
diff --git a/libphobos/libdruntime/Makefile.am b/libphobos/libdruntime/Makefile.am
index 41ccfaa339c..c7b03a5967d 100644
--- a/libphobos/libdruntime/Makefile.am
+++ b/libphobos/libdruntime/Makefile.am
@@ -24,7 +24,7 @@ D_EXTRA_DFLAGS=-nostdinc -I $(srcdir) -I .
 # D flags for compilation
 AM_DFLAGS= \
 	$(phobos_compiler_pic_flag) \
-	$(WARN_DFLAGS)
+	$(WARN_DFLAGS) $(CHECKING_DFLAGS)
 
 # Install all D and DI files
 ALL_DRUNTIME_INSTALL_DSOURCES = $(DRUNTIME_DSOURCES) \
diff --git a/libphobos/libdruntime/Makefile.in b/libphobos/libdruntime/Makefile.in
index 9277e0a1665..e0688e25c81 100644
--- a/libphobos/libdruntime/Makefile.in
+++ b/libphobos/libdruntime/Makefile.in
@@ -555,6 +555,7 @@ CCASFLAGS = @CCASFLAGS@
 CC_FOR_BUILD = @CC_FOR_BUILD@
 CFLAGS = @CFLAGS@
 CFLAGS_FOR_BUILD = @CFLAGS_FOR_BUILD@
+CHECKING_DFLAGS = @CHECKING_DFLAGS@
 CPP = @CPP@
 CPPFLAGS = @CPPFLAGS@
 CYGPATH_W = @CYGPATH_W@
@@ -715,7 +716,7 @@ D_EXTRA_DFLAGS = -nostdinc -I $(srcdir) -I .
 # D flags for compilation
 AM_DFLAGS = \
 	$(phobos_compiler_pic_flag) \
-	$(WARN_DFLAGS)
+	$(WARN_DFLAGS) $(CHECKING_DFLAGS)
 
 
 # Install all D and DI files
diff --git a/libphobos/src/Makefile.am b/libphobos/src/Makefile.am
index 5c17538613a..d2418a8ca83 100644
--- a/libphobos/src/Makefile.am
+++ b/libphobos/src/Makefile.am
@@ -25,7 +25,7 @@ D_EXTRA_DFLAGS=-nostdinc -I $(srcdir) \
 # D flags for compilation
 AM_DFLAGS= \
 	$(phobos_compiler_pic_flag) \
-	$(WARN_DFLAGS)
+	$(WARN_DFLAGS) $(CHECKING_DFLAGS)
 
 # Install all D files
 ALL_PHOBOS_INSTALL_DSOURCES = $(PHOBOS_DSOURCES)
diff --git a/libphobos/src/Makefile.in b/libphobos/src/Makefile.in
index e58dafb5e7c..45651672e1e 100644
--- a/libphobos/src/Makefile.in
+++ b/libphobos/src/Makefile.in
@@ -278,6 +278,7 @@ CCASFLAGS = @CCASFLAGS@
 CC_FOR_BUILD = @CC_FOR_BUILD@
 CFLAGS = @CFLAGS@
 CFLAGS_FOR_BUILD = @CFLAGS_FOR_BUILD@
+CHECKING_DFLAGS = @CHECKING_DFLAGS@
 CPP = @CPP@
 CPPFLAGS = @CPPFLAGS@
 CYGPATH_W = @CYGPATH_W@
@@ -440,7 +441,7 @@ D_EXTRA_DFLAGS = -nostdinc -I $(srcdir) \
 # D flags for compilation
 AM_DFLAGS = \
 	$(phobos_compiler_pic_flag) \
-	$(WARN_DFLAGS)
+	$(WARN_DFLAGS) $(CHECKING_DFLAGS)
 
 
 # Install all D files
diff --git a/libphobos/testsuite/Makefile.in b/libphobos/testsuite/Makefile.in
index b70a996d95d..6f0eaf83405 100644
--- a/libphobos/testsuite/Makefile.in
+++ b/libphobos/testsuite/Makefile.in
@@ -151,6 +151,7 @@ CCASFLAGS = @CCASFLAGS@
 CC_FOR_BUILD = @CC_FOR_BUILD@
 CFLAGS = @CFLAGS@
 CFLAGS_FOR_BUILD = @CFLAGS_FOR_BUILD@
+CHECKING_DFLAGS = @CHECKING_DFLAGS@
 CPP = @CPP@
 CPPFLAGS = @CPPFLAGS@
 CYGPATH_W = @CYGPATH_W@
diff --git a/libphobos/testsuite/testsuite_flags.in b/libphobos/testsuite/testsuite_flags.in
index 990221a3d0f..808dde30993 100755
--- a/libphobos/testsuite/testsuite_flags.in
+++ b/libphobos/testsuite/testsuite_flags.in
@@ -28,7 +28,7 @@ case ${query} in
       ;;
     --gdcflags)
       GDCFLAGS_default="-fmessage-length=0 -fno-show-column"
-      GDCFLAGS_config="@WARN_DFLAGS@ @GDCFLAGSX@"
+      GDCFLAGS_config="@WARN_DFLAGS@ @GDCFLAGSX@ -fno-release -funittest"
       echo ${GDCFLAGS_default} ${GDCFLAGS_config}
       ;;
     --gdcpaths)