math/mp-sqrt.c: Explain the algorithm, and particularly the end condition.

[catacomb] / configure.ac

diff --git a/configure.ac b/configure.ac
index b41687a..042c7c3 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -78,8 +78,8 @@ AC_DEFUN([catacomb_CPU_FAMILIES],
    $1([i[[3-6]]86,*], [x86], [sysv])
    $1([x86_64,cygwin], [amd64], [win])
    $1([x86_64,*], [amd64], [sysv])
    $1([i[[3-6]]86,*], [x86], [sysv])
    $1([x86_64,cygwin], [amd64], [win])
    $1([x86_64,*], [amd64], [sysv])

-   $1([arm,*-gnueabi | arm,*-gnueabihf | dnl
-       armv*,*-gnueabi | armv*,*-gnueabihf], [armel], [gnueabi])])
+   $1([arm,* | armv*,*], [armel], [std])
+   $1([aarch64,*], [arm64], [std])])

 
 dnl A utility to clear the `seen' flags, used so as to process each CPU or
 dnl ABI once.
 
 dnl A utility to clear the `seen' flags, used so as to process each CPU or
 dnl ABI once.


@@ -158,6 +158,17 @@ catacomb_DEFINE_CPU_OR_ABI([CPUFAM], [2], [cpu],
 catacomb_DEFINE_CPU_OR_ABI([ABI], [3], [abi],
   [ABI_], [Define if target ABI is \`$][3\'.])
 
 catacomb_DEFINE_CPU_OR_ABI([ABI], [3], [abi],
   [ABI_], [Define if target ABI is \`$][3\'.])
 

+AC_ARG_ENABLE([asm-debug],
+  AS_HELP_STRING([--enable-asm-debug],
+    [enable assembler debugging features]),
+  [mdw_asm_debug=$enableval], [mdw_asm_debug=no])
+case $CPUFAM in nil) mdw_asm_debug=no ;; esac
+case mdw_asm_debug in
+  no) ;;
+  *) AC_DEFINE([ENABLE_ASM_DEBUG], [1],
+       [Define to enable assembler-level debugging.]) ;;
+esac
+

 dnl Establish Automake conditions for things.
 catacomb_CPU_FAMILIES([catacomb_CLEAR_FLAGS])
 m4_define([catacomb_COND_CPU],
 dnl Establish Automake conditions for things.
 catacomb_CPU_FAMILIES([catacomb_CLEAR_FLAGS])
 m4_define([catacomb_COND_CPU],


@@ -172,6 +183,7 @@ m4_ifdef([catacomb_seen_abi/$3], [],
 m4_define([catacomb_seen_abi/$3], [t])])])
 catacomb_CPU_FAMILIES([catacomb_COND_CPU])
 AM_CONDITIONAL([KNOWN_CPUFAM], [test x$CPUFAM != xnil])
 m4_define([catacomb_seen_abi/$3], [t])])])
 catacomb_CPU_FAMILIES([catacomb_COND_CPU])
 AM_CONDITIONAL([KNOWN_CPUFAM], [test x$CPUFAM != xnil])

+AM_CONDITIONAL([ASM_DEBUG], [test x$mdw_asm_debug != xno])

 
 dnl Report on what we found.
 case $CPUFAM in
 
 dnl Report on what we found.
 case $CPUFAM in


@@ -239,11 +251,10 @@ AC_CHECK_TYPE([socklen_t], [],
 ])
 
 dnl The maths library.
 ])
 
 dnl The maths library.

-mdw_ORIG_LIBS=$LIBS LIBS=
+mdw_ORIG_LIBS=$LIBS LIBS=$CATACOMB_LIBS

 AC_SEARCH_LIBS([log], [m])
 AC_SEARCH_LIBS([sqrt], [m])
 AC_SEARCH_LIBS([log], [m])
 AC_SEARCH_LIBS([sqrt], [m])

-AC_SUBST([MATHLIBS], [$LIBS])
-LIBS=$mdw_ORIG_LIBS
+CATACOMB_LIBS=$LIBS LIBS=$mdw_ORIG_LIBS

 
 dnl Logging is weird under Termux.  Unfortunately, it involves macros, so we
 dnl have to do this the hard way.
 
 dnl Logging is weird under Termux.  Unfortunately, it involves macros, so we
 dnl have to do this the hard way.


@@ -279,6 +290,9 @@ AC_CHECK_HEADERS([sys/auxv.h])
 AC_CHECK_HEADERS([linux/auxvec.h])
 AC_CHECK_FUNCS([getauxval])
 
 AC_CHECK_HEADERS([linux/auxvec.h])
 AC_CHECK_FUNCS([getauxval])
 

+dnl Some equipment for measuring CPU performance.
+AC_CHECK_HEADERS([linux/perf_event.h])
+

 dnl Find the bit lengths of the obvious integer types.  This will be useful
 dnl when deciding on a representation for multiprecision integers.
 type_bits="" type_bits_sep=""
 dnl Find the bit lengths of the obvious integer types.  This will be useful
 dnl when deciding on a representation for multiprecision integers.
 type_bits="" type_bits_sep=""


@@ -401,7 +415,7 @@ dnl Set the master libraries we need.
 AC_SUBST([CATACOMB_LIBS])
 
 dnl Necessary support libraries.
 AC_SUBST([CATACOMB_LIBS])
 
 dnl Necessary support libraries.

-PKG_CHECK_MODULES([mLib], [mLib >= 2.2.2.1])
+PKG_CHECK_MODULES([mLib], [mLib >= 2.3.0])

 AM_CFLAGS="$AM_CFLAGS $mLib_CFLAGS"
 
 dnl--------------------------------------------------------------------------
 AM_CFLAGS="$AM_CFLAGS $mLib_CFLAGS"
 
 dnl--------------------------------------------------------------------------