libgloss: merge pru into top-level Makefile

Avoid a recursive make to speed things up a bit.  This change was
inspired by the recent similar patch for c6x:
https://sourceware.org/pipermail/newlib/2023/020869.html

While at it, fork crt0-minrt.S into a separate source file instead of
relying on a predefined macro to generate two different object files.
This improves clarity, simplifies the build rules, and would allow
further optimization in crt0-minrt.S to be implemented more cleanly.

Signed-off-by: Dimitar Dimitrov <dimitar@dinux.eu>

1 files changed, 28 insertions, 5 deletions

diff --git a/libgloss/configure b/libgloss/configure
index fd5d9416b..722106ae3 100755
--- a/libgloss/configure
+++ b/libgloss/configure
@@ -672,6 +672,8 @@ CONFIG_RL78_FALSE
 CONFIG_RL78_TRUE
 CONFIG_RISCV_FALSE
 CONFIG_RISCV_TRUE
+CONFIG_PRU_FALSE
+CONFIG_PRU_TRUE
 CONFIG_OR1K_FALSE
 CONFIG_OR1K_TRUE
 CONFIG_NIOS2_FALSE
@@ -790,6 +792,7 @@ infodir
 docdir
 oldincludedir
 includedir
+runstatedir
 localstatedir
 sharedstatedir
 sysconfdir
@@ -868,6 +871,7 @@ datadir='${datarootdir}'
 sysconfdir='${prefix}/etc'
 sharedstatedir='${prefix}/com'
 localstatedir='${prefix}/var'
+runstatedir='${localstatedir}/run'
 includedir='${prefix}/include'
 oldincludedir='/usr/include'
 docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
@@ -1120,6 +1124,15 @@ do
   | -silent | --silent | --silen | --sile | --sil)
     silent=yes ;;
 
+  -runstatedir | --runstatedir | --runstatedi | --runstated \
+  | --runstate | --runstat | --runsta | --runst | --runs \
+  | --run | --ru | --r)
+    ac_prev=runstatedir ;;
+  -runstatedir=* | --runstatedir=* | --runstatedi=* | --runstated=* \
+  | --runstate=* | --runstat=* | --runsta=* | --runst=* | --runs=* \
+  | --run=* | --ru=* | --r=*)
+    runstatedir=$ac_optarg ;;
+
   -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
     ac_prev=sbindir ;;
   -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
@@ -1257,7 +1270,7 @@ fi
 for ac_var in	exec_prefix prefix bindir sbindir libexecdir datarootdir \
 		datadir sysconfdir sharedstatedir localstatedir includedir \
 		oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
-		libdir localedir mandir
+		libdir localedir mandir runstatedir
 do
   eval ac_val=\$$ac_var
   # Remove trailing slashes.
@@ -1410,6 +1423,7 @@ Fine tuning of the installation directories:
   --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
   --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
   --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
+  --runstatedir=DIR       modifiable per-process data [LOCALSTATEDIR/run]
   --libdir=DIR            object code libraries [EPREFIX/lib]
   --includedir=DIR        C header files [PREFIX/include]
   --oldincludedir=DIR     C header files for non-gcc [/usr/include]
@@ -2989,9 +3003,7 @@ case "${target}" in
 	config_or1k=true
 	;;
   pru-*-*)
-	ac_config_files="$ac_config_files pru/Makefile"
-
-	subdirs="$subdirs pru"
+	config_pru=true
 	;;
   nios2-*-*)
 	config_nios2=true
@@ -3199,6 +3211,14 @@ else
   CONFIG_OR1K_FALSE=
 fi
 
+   if test x$config_pru = xtrue; then
+  CONFIG_PRU_TRUE=
+  CONFIG_PRU_FALSE='#'
+else
+  CONFIG_PRU_TRUE='#'
+  CONFIG_PRU_FALSE=
+fi
+
    if test x$config_riscv = xtrue; then
   CONFIG_RISCV_TRUE=
   CONFIG_RISCV_FALSE='#'
@@ -5879,6 +5899,10 @@ if test -z "${CONFIG_OR1K_TRUE}" && test -z "${CONFIG_OR1K_FALSE}"; then
   as_fn_error $? "conditional \"CONFIG_OR1K\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
 fi
+if test -z "${CONFIG_PRU_TRUE}" && test -z "${CONFIG_PRU_FALSE}"; then
+  as_fn_error $? "conditional \"CONFIG_PRU\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
 if test -z "${CONFIG_RISCV_TRUE}" && test -z "${CONFIG_RISCV_FALSE}"; then
   as_fn_error $? "conditional \"CONFIG_RISCV\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
@@ -6595,7 +6619,6 @@ do
     "mt/Makefile") CONFIG_FILES="$CONFIG_FILES mt/Makefile" ;;
     "m32c/Makefile") CONFIG_FILES="$CONFIG_FILES m32c/Makefile" ;;
     "spu/Makefile") CONFIG_FILES="$CONFIG_FILES spu/Makefile" ;;
-    "pru/Makefile") CONFIG_FILES="$CONFIG_FILES pru/Makefile" ;;
     "depfiles") CONFIG_COMMANDS="$CONFIG_COMMANDS depfiles" ;;
     "sparc/libsys/Makefile") CONFIG_FILES="$CONFIG_FILES sparc/libsys/Makefile" ;;
     "default-1") CONFIG_COMMANDS="$CONFIG_COMMANDS default-1" ;;