[PATCH] newlib: libm: move configure into top-level

This kills off the last configure script under libm/ and folds it
into the top newlib configure script.  The vast majority of logic
was already in the top configure script, so move the little that
is left into a libm/acinclude.m4 file.
---
 newlib/Makefile.in                      |     6 +-
 newlib/configure                        |  1171 +-
 newlib/configure.ac                     |     4 +-
 newlib/libm/Makefile.am                 |     3 -
 newlib/libm/Makefile.in                 |   128 +-
 newlib/libm/acinclude.m4                |    33 +
 newlib/libm/aclocal.m4                  |  1178 --
 newlib/libm/common/Makefile.in          |    53 +-
 newlib/libm/complex/Makefile.in         |    53 +-
 newlib/libm/configure                   | 14532 ----------------------
 newlib/libm/configure.ac                |    68 -
 newlib/libm/fenv/Makefile.in            |    53 +-
 newlib/libm/machine/aarch64/Makefile.in |    53 +-
 newlib/libm/machine/arm/Makefile.in     |    53 +-
 newlib/libm/machine/i386/Makefile.in    |    53 +-
 newlib/libm/machine/mips/Makefile.in    |    53 +-
 newlib/libm/machine/nds32/Makefile.in   |    53 +-
 newlib/libm/machine/powerpc/Makefile.in |    53 +-
 newlib/libm/machine/pru/Makefile.in     |    53 +-
 newlib/libm/machine/riscv/Makefile.in   |    53 +-
 newlib/libm/machine/sparc/Makefile.in   |    53 +-
 newlib/libm/machine/spu/Makefile.in     |    53 +-
 newlib/libm/machine/x86_64/Makefile.in  |    53 +-
 newlib/libm/math/Makefile.in            |    53 +-
 newlib/libm/mathfp/Makefile.in          |    53 +-
 25 files changed, 1435 insertions(+), 16536 deletions(-)
 create mode 100644 newlib/libm/acinclude.m4
 delete mode 100644 newlib/libm/aclocal.m4
 delete mode 100755 newlib/libm/configure
 delete mode 100644 newlib/libm/configure.ac

diff --git a/newlib/configure.ac b/newlib/configure.ac
index 2e6a80a5f8b3..dece7d09abe0 100644
--- a/newlib/configure.ac
+++ b/newlib/configure.ac
@@ -286,7 +286,9 @@ AC_ARG_ENABLE(newlib-use-gdtoa,
  fi], [newlib_use_gdtoa=yes])dnl
 
 AM_ENABLE_MULTILIB(, ..)
+AC_NO_EXECUTABLES
 NEWLIB_CONFIGURE(.)
+AC_PROG_CPP
 
 dnl We have to enable libtool after NEWLIB_CONFIGURE because if we try and
 dnl add it into NEWLIB_CONFIGURE, executable tests are made before the first
@@ -323,7 +325,7 @@ fi
 AC_SUBST(CC_FOR_NEWLIB)
 
 AC_CONFIG_SUBDIRS(libc)
-AC_CONFIG_SUBDIRS(libm)
+m4_include([libm/acinclude.m4])
 
 if test -z "${with_multisubdir}"; then
   have_multisubdir=no
diff --git a/newlib/libm/Makefile.am b/newlib/libm/Makefile.am
index 6ea7ec04fb19..ea9f501f85ed 100644
--- a/newlib/libm/Makefile.am
+++ b/newlib/libm/Makefile.am
@@ -35,6 +35,3 @@ libm.a: $(SUBLIBS)
 endif
 
 $(SUBLIBS):
-
-ACLOCAL_AMFLAGS = -I .. -I ../.. -I ../../config
-CONFIG_STATUS_DEPENDENCIES = $(newlib_basedir)/configure.host
diff --git a/newlib/libm/acinclude.m4 b/newlib/libm/acinclude.m4
new file mode 100644
index 000000000000..25054dc8c178
--- /dev/null
+++ b/newlib/libm/acinclude.m4
@@ -0,0 +1,33 @@
+dnl We have to include these unconditionally since machines might want to use
+dnl AM_CONDITIONAL in their subdirs.
+m4_include([libm/machine/nds32/acinclude.m4])
+
+LIBM_MACHINE_LIB=
+if test -n "${libm_machine_dir}"; then
+  case ${libm_machine_dir} in
+    aarch64) AC_CONFIG_FILES([libm/machine/aarch64/Makefile]) ;;
+    arm) AC_CONFIG_FILES([libm/machine/arm/Makefile]) ;;
+    i386) AC_CONFIG_FILES([libm/machine/i386/Makefile]) ;;
+    nds32) AC_CONFIG_FILES([libm/machine/nds32/Makefile]) ;;
+    pru) AC_CONFIG_FILES([libm/machine/pru/Makefile]) ;;
+    spu) AC_CONFIG_FILES([libm/machine/spu/Makefile]) ;;
+    riscv) AC_CONFIG_FILES([libm/machine/riscv/Makefile]) ;;
+    x86_64) AC_CONFIG_FILES([libm/machine/x86_64/Makefile]) ;;
+    powerpc) AC_CONFIG_FILES([libm/machine/powerpc/Makefile]) ;;
+    sparc) AC_CONFIG_FILES([libm/machine/sparc/Makefile]) ;;
+    mips) AC_CONFIG_FILES([libm/machine/mips/Makefile]) ;;
+    *) AC_MSG_ERROR([unsupported libm_machine_dir "${libm_machine_dir}"]) ;;
+  esac
+
+  LIBM_MACHINE_DIR=machine/${libm_machine_dir}
+  if test "${use_libtool}" = "yes"; then
+    LIBM_MACHINE_LIB=${LIBM_MACHINE_DIR}/lib${libm_machine_dir}.${aext}
+  else
+    LIBM_MACHINE_LIB=${LIBM_MACHINE_DIR}/lib.${aext}
+  fi
+fi
+AM_CONDITIONAL(HAVE_LIBM_MACHINE_DIR, test "x${LIBM_MACHINE_DIR}" != x)
+AC_SUBST(LIBM_MACHINE_DIR)
+AC_SUBST(LIBM_MACHINE_LIB)
+
+AC_CONFIG_FILES([libm/Makefile libm/math/Makefile libm/mathfp/Makefile libm/common/Makefile libm/complex/Makefile libm/fenv/Makefile])
diff --git a/newlib/libm/configure.ac b/newlib/libm/configure.ac
deleted file mode 100644
index a03ea3872bd5..000000000000
--- a/newlib/libm/configure.ac
+++ /dev/null
@@ -1,68 +0,0 @@
-dnl This is the newlib/libm configure.in file.
-dnl Process this file with autoconf to produce a configure script.
-
-AC_INIT([newlib],[NEWLIB_VERSION])
-AC_CONFIG_SRCDIR([libm.texi])
-
-AC_ARG_ENABLE(newlib_hw_fp,
-[  --enable-newlib-hw-fp    Turn on hardware floating point math],
-[case "${enableval}" in
-   yes) newlib_hw_fp=true ;;
-   no)  newlib_hw_fp=false ;;
-   *) AC_MSG_ERROR(bad value ${enableval} for --enable-newlib-hw-fp) ;;
- esac],[newlib_hw_fp=false])
-AM_CONDITIONAL(NEWLIB_HW_FP, test x$newlib_hw_fp = xtrue)
-
-dnl Can't be done in NEWLIB_CONFIGURE because that confuses automake. 
-AC_CONFIG_AUX_DIR(../..)
-
-AC_NO_EXECUTABLES
-NEWLIB_CONFIGURE(..)
-AC_PROG_CPP
-
-dnl We have to enable libtool after NEWLIB_CONFIGURE because if we try and
-dnl add it into NEWLIB_CONFIGURE, executable tests are made before the first
-dnl line of the macro which fail because appropriate LDFLAGS are not set.
-_LT_DECL_SED
-_LT_PROG_ECHO_BACKSLASH
-if test "${use_libtool}" = "yes"; then
-LT_INIT([win32-dll])
-fi
-
-AC_TYPE_LONG_DOUBLE
-AM_CONDITIONAL(HAVE_LONG_DOUBLE, test x"$ac_cv_type_long_double" = x"yes")
-
-dnl We have to include these unconditionally since machines might want to use
-dnl AM_CONDITIONAL in their subdirs.
-m4_include([machine/nds32/acinclude.m4])
-
-LIBM_MACHINE_LIB=
-if test -n "${libm_machine_dir}"; then
-  case ${libm_machine_dir} in
-    aarch64) AC_CONFIG_FILES([machine/aarch64/Makefile]) ;;
-    arm) AC_CONFIG_FILES([machine/arm/Makefile]) ;;
-    i386) AC_CONFIG_FILES([machine/i386/Makefile]) ;;
-    nds32) AC_CONFIG_FILES([machine/nds32/Makefile]) ;;
-    pru) AC_CONFIG_FILES([machine/pru/Makefile]) ;;
-    spu) AC_CONFIG_FILES([machine/spu/Makefile]) ;;
-    riscv) AC_CONFIG_FILES([machine/riscv/Makefile]) ;;
-    x86_64) AC_CONFIG_FILES([machine/x86_64/Makefile]) ;;
-    powerpc) AC_CONFIG_FILES([machine/powerpc/Makefile]) ;;
-    sparc) AC_CONFIG_FILES([machine/sparc/Makefile]) ;;
-    mips) AC_CONFIG_FILES([machine/mips/Makefile]) ;;
-    *) AC_MSG_ERROR([unsupported libm_machine_dir "${libm_machine_dir}"]) ;;
-  esac
-
-  LIBM_MACHINE_DIR=machine/${libm_machine_dir}
-  if test "${use_libtool}" = "yes"; then
-    LIBM_MACHINE_LIB=${LIBM_MACHINE_DIR}/lib${libm_machine_dir}.${aext}
-  else
-    LIBM_MACHINE_LIB=${LIBM_MACHINE_DIR}/lib.${aext}
-  fi
-fi
-AM_CONDITIONAL(HAVE_LIBM_MACHINE_DIR, test "x${LIBM_MACHINE_DIR}" != x)
-AC_SUBST(LIBM_MACHINE_DIR)
-AC_SUBST(LIBM_MACHINE_LIB)
-
-AC_CONFIG_FILES([Makefile math/Makefile mathfp/Makefile common/Makefile complex/Makefile fenv/Makefile])
-AC_OUTPUT
-- 
2.34.1