[gcc r11-6144] libcody: More dashism

[gcc r11-6144] libcody: More dashism

[Nathan Sidwell]

https://gcc.gnu.org/g:6d972f5183d8d476cfb008b85e224aa9b90e628d

commit r11-6144-g6d972f5183d8d476cfb008b85e224aa9b90e628d
Author: Nathan Sidwell <nathan@acm.org>
Date:   Wed Dec 16 06:03:38 2020 -0800

    libcody: More dashism
    
    There were still some dash-killing uses of +=.  Fixed thusly.
    
            * config.m4: Replace V+="..." with V="$V..."
            * configure: Rebuilt.

Diff:
---
 libcody/config.m4 | 17 +++++++++--------
 libcody/configure | 13 +++++++------
 2 files changed, 16 insertions(+), 14 deletions(-)

diff --git a/libcody/config.m4 b/libcody/config.m4
index 801cfbdb593..ce5e84d0278 100644
--- a/libcody/config.m4
+++ b/libcody/config.m4
@@ -2,6 +2,8 @@
 # Copyright (C) 2020 Nathan Sidwell, nathan@acm.org
 # License: Apache v2.0
 
+# Note: VAR+=... is not dashing, despite its looks
+
 AC_DEFUN([NMS_NOT_IN_SOURCE],
 [if test -e configure ; then
 AC_MSG_ERROR([Do not build in the source tree.  Reasons])
@@ -28,14 +30,13 @@ fi])
 
 AC_DEFUN([NMS_TOOL_DIRS],
 [if test "$tools" && test -d "$tools/include" ; then
-  CXX+=" -I$tools/include"
+  CXX="$CXX -I$tools/include"
 fi
 if test "$tools" && test -d "$tools/lib" ; then
   toollib="$tools/lib"
   if os=$(CXX -print-multi-os-directory 2>/dev/null) ; then
-    toollib+="/${os}"
+    toollib="$toollib/${os}"
   fi
-  ## VAR+=... is not dashing
   LDFLAGS="$LDFLAGS -L $toollib"
   unset toollib
 fi])
@@ -86,7 +87,7 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
 ]])],
 [AC_MSG_RESULT([yes])],
 [CXX_ORIG="$CXX"
-CXX+=" -std=c++11"
+CXX="$CXX -std=c++11"
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
 [#if __cplusplus != 201103
 #error "C++11 is required"
@@ -112,7 +113,7 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
 #endif
 ]])],
 [AC_MSG_RESULT([yes])],
-[CXX+=" -std=c++20"
+[CXX="$CXX -std=c++20"
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
 [#if __cplusplus <= 201703
 #error "C++20 is required"
@@ -248,7 +249,7 @@ if test "${enable_backtrace:-maybe}" != no ; then
     AC_CHECK_HEADERS([demangle.h libiberty/demangle.h],[break])
     # libbfd prevents distribution because of licensing
     AC_CHECK_HEADERS([bfd.h])
-    AC_SEARCH_LIBS([bfd_openr],[bfd],[LIBS+="-lz -liberty -ldl"],,[-lz -liberty -ldl])
+    AC_SEARCH_LIBS([bfd_openr],[bfd],[LIBS="$LIBS -lz -liberty -ldl"],,[-lz -liberty -ldl])
   fi
   if test "$ac_cv_func_backtrace" = yes ; then
     nms_backtrace=yes
@@ -272,8 +273,8 @@ for generated in config.h.in configure ; do
 done
 for dir in . $SUBDIRS
 do
-  CONFIG_FILES+=" $dir/Makesub"
-  test -f ${srcdir}/$dir/tests/Makesub.in && CONFIG_FILES+=" $dir/tests/Makesub"
+  CONFIG_FILES="$CONFIG_FILES $dir/Makesub"
+  test -f ${srcdir}/$dir/tests/Makesub.in && CONFIG_FILES="$CONFIG_FILES $dir/tests/Makesub"
 done
 AC_CONFIG_FILES([$CONFIG_FILES])
 AC_SUBST(configure_args,[$ac_configure_args])
diff --git a/libcody/configure b/libcody/configure
index 1a119c59b9f..4cc03dcaa3a 100755
--- a/libcody/configure
+++ b/libcody/configure
@@ -1824,6 +1824,8 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 # Copyright (C) 2020 Nathan Sidwell, nathan@acm.org
 # License: Apache v2.0
 
+# Note: VAR+=... is not dashing, despite its looks
+
 
 
 # thanks to Zack Weinberg for fixing this!
@@ -2574,7 +2576,7 @@ if ac_fn_cxx_try_compile "$LINENO"; then :
 $as_echo "yes" >&6; }
 else
   CXX_ORIG="$CXX"
-CXX+=" -std=c++11"
+CXX="$CXX -std=c++11"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -2625,14 +2627,13 @@ unset CXX_ORIG
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 if test "$tools" && test -d "$tools/include" ; then
-  CXX+=" -I$tools/include"
+  CXX="$CXX -I$tools/include"
 fi
 if test "$tools" && test -d "$tools/lib" ; then
   toollib="$tools/lib"
   if os=$(CXX -print-multi-os-directory 2>/dev/null) ; then
-    toollib+="/${os}"
+    toollib="$toollib/${os}"
   fi
-  ## VAR+=... is not dashing
   LDFLAGS="$LDFLAGS -L $toollib"
   unset toollib
 fi
@@ -2671,8 +2672,8 @@ for generated in config.h.in configure ; do
 done
 for dir in . $SUBDIRS
 do
-  CONFIG_FILES+=" $dir/Makesub"
-  test -f ${srcdir}/$dir/tests/Makesub.in && CONFIG_FILES+=" $dir/tests/Makesub"
+  CONFIG_FILES="$CONFIG_FILES $dir/Makesub"
+  test -f ${srcdir}/$dir/tests/Makesub.in && CONFIG_FILES="$CONFIG_FILES $dir/tests/Makesub"
 done
 ac_config_files="$ac_config_files $CONFIG_FILES"