X-Git-Url: https://git.distorted.org.uk/~mdw/catacomb/blobdiff_plain/6d4416ccb0bbe02105c4b9dfa1442b9198c0d923..b45877de6cf776dbbd38f9d9290df80b15a46e9c:/configure.ac

diff --git a/configure.ac b/configure.ac
index 7887da32..6171efd2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -47,6 +47,43 @@ AC_PROG_YACC
 AC_SUBST(AM_CFLAGS)
 
 dnl--------------------------------------------------------------------------
+dnl Define language support for assembler.
+dnl
+dnl This is stolen from https://gitlab.crest.iu.edu/jsfiroz/hpx/commit/
+dnl 84be4345db6eec3797a57b8e53483cb43f4733bf
+
+AC_LANG_DEFINE([CPPAS], [cppas], [CPPAS], [CCAS], [C],
+  [ac_ext=S ac_cpp='$CPP $CPPFLAGS'
+   ac_compile='$CCAS -c $CCASFLAGS $CPPFLAGS dnl
+	conftest.$ac_ext >&AS_MESSAGE_LOG_FD'
+   ac_link='$CCAS -oconftest$ac_exeext $CCASFLAGS $CPPFLAGS $LDFLAGS dnl
+	conftest.$ac_ext $LIBS >&AS_MESSAGE_LOG_FD'])
+
+AC_DEFUN([AC_LANG_PREPROC(CPPAS)], [AC_REQUIRE([AC_PROG_CPP])])
+AC_DEFUN([AC_LANG_COMPILER(CPPAS)], [AC_REQUIRE([AM_PROG_AS])])
+AC_DEFUN([AC_LANG_CONFTEST(CPPAS)],
+  [cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+$1
+_ACEOF])
+
+AC_CACHE_CHECK(
+  [whether the assembler is likely to work], [mdw_cv_gnuish_as],
+  [AC_LANG_PUSH([CPPAS])
+   AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+	.text
+	.L\$_test = 23
+.macro	mymac
+	.L\$_test = .L\$_test + 1
+.endm
+	.globl	foo
+	.extern	bar
+	mymac]])],
+     [mdw_cv_gnuish_as=yes], [mdw_cv_gnuish_as=no])
+   AC_LANG_POP([CPPAS])])
+AM_CONDITIONAL([GNUISH_AS], [test $mdw_cv_gnuish_as = yes])
+
+dnl--------------------------------------------------------------------------
 dnl Host-specific configuration.
 
 AC_MSG_CHECKING([CPU family and ABI])
@@ -71,13 +108,17 @@ m4_ifdef([catacomb_seen_abi/$3],
 	  [m4_undefine([catacomb_seen_abi/$3])])])
 
 dnl Identify the current host.
-case $host_cpu,$host_os in
-  m4_define([catacomb_CPU_CASE],
-    [$1) CPUFAM=$2 ABI=$3 ;;
+if test $mdw_cv_gnuish_as = no; then
+  CPUFAM=nil ABI=nil
+else
+  case $host_cpu,$host_os in
+    m4_define([catacomb_CPU_CASE],
+      [$1) CPUFAM=$2 ABI=$3 ;;
 ])
-  catacomb_CPU_FAMILIES([catacomb_CPU_CASE])
-  *) CPUFAM=nil ABI=nil ;;
-esac
+    catacomb_CPU_FAMILIES([catacomb_CPU_CASE])
+    *) CPUFAM=nil ABI=nil ;;
+  esac
+fi
 
 dnl Figure out the current CPU.
 catacomb_CPU_FAMILIES([catacomb_CLEAR_FLAGS])
@@ -130,23 +171,64 @@ case $CPUFAM in
   *) AC_MSG_RESULT([$CPUFAM/$ABI]) ;;
 esac
 
-dnl Some equipment wanted for checking CPU features at runtime.
-AC_CHECK_HEADERS([asm/hwcap.h])
-AC_CHECK_HEADERS([sys/auxv.h])
-AC_CHECK_HEADERS([linux/auxvec.h])
-AC_CHECK_FUNCS([getauxval])
+dnl--------------------------------------------------------------------------
+dnl CPU-specific assembler features.
+
+AC_LANG([CPPAS])
+
+case $CPUFAM in
+  armel)
+    AC_CACHE_CHECK(
+      [whether the assembler understands ARMv8 crypto extensions],
+      [mdw_cv_as_armv8_crypto],
+      [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+	.arch	armv8-a
+	.fpu	crypto-neon-fp-armv8
+
+	.text
+	.globl	foo
+foo:
+	vldmia	r0, {d0-d3}
+	aese.8	q0, q1
+	aesmc.8	q0, q0
+	vstmia	r0, {d0, d1}
+	bx	r14]])],
+	 [mdw_cv_as_armv8_crypto=yes],
+	 [mdw_cv_as_armv8_crypto=no])])
+    ;;
+esac
+
+: ${mdw_cv_as_armv8_crypto=no}
+AM_CONDITIONAL([HAVE_AS_ARMV8_CRYPTO], [test $mdw_cv_as_armv8_crypto = yes])
+if test $mdw_cv_as_armv8_crypto = yes; then
+  AC_DEFINE([HAVE_AS_ARMV8_CRYPTO], [1],
+    [Define to 1 if your ARM assembler supports the ARMv8 crypto instructions.])
+fi
 
 dnl--------------------------------------------------------------------------
 dnl C programming environment.
 
+AC_LANG([C])
+
+CATACOMB_LIBS=
+
 dnl Find out if we're cross-compiling.
 AM_CONDITIONAL([CROSS_COMPILING], [test "$cross_compiling" = yes])
 
 dnl Various standard types.
-AC_CHECK_TYPE([pid_t], [int])
+AC_CHECK_TYPE([pid_t], [],
+  [AC_DEFINE([pid_t], [int],
+     [Define to `int' if <sys/types.h> does not define])])
 AC_TYPE_UID_T
-AC_CHECK_TYPE([ssize_t], [int])
-AC_CHECK_TYPE([socklen_t], [int])
+AC_CHECK_TYPE([ssize_t], [],
+  [AC_DEFINE([ssize_t], [int],
+     [Define to `int' if <sys/types.h> does not define])])
+AC_CHECK_TYPE([socklen_t], [],
+  [AC_DEFINE([socklen_t], [int],
+     [Define to `int' if <sys/socket.h> does not define])],
+  [AC_INCLUDES_DEFAULT
+#include <sys/socket.h>
+])
 
 dnl The maths library.
 mdw_ORIG_LIBS=$LIBS LIBS=
@@ -158,7 +240,13 @@ LIBS=$mdw_ORIG_LIBS
 dnl Find out whether very long integer types are available.
 AC_CHECK_HEADERS([stdint.h])
 AC_SUBST([have_stdint_h])
-AC_C_LONG_LONG
+AX_C_LONG_LONG
+
+dnl Some equipment wanted for checking CPU features at runtime.
+AC_CHECK_HEADERS([asm/hwcap.h])
+AC_CHECK_HEADERS([sys/auxv.h])
+AC_CHECK_HEADERS([linux/auxvec.h])
+AC_CHECK_FUNCS([getauxval])
 
 dnl Find the bit lengths of the obvious integer types.  This will be useful
 dnl when deciding on a representation for multiprecision integers.
@@ -222,6 +310,13 @@ AC_SUBST([limits])
 dnl Functions used for noise-gathering.
 AC_CHECK_FUNCS([setgroups])
 AC_CHECK_HEADERS([linux/random.h])
+mdw_ORIG_LIBS=$LIBS LIBS=$CATACOMB_LIBS
+AC_SEARCH_LIBS([clock_gettime], [rt])
+CATACOMB_LIBS=$LIBS LIBS=$mdw_ORIG_LIBS
+if test "$ac_cv_search_clock_gettime" != no; then
+  AC_DEFINE([HAVE_CLOCK_GETTIME], [1],
+	    [Define if you have the \`clock_gettime' function.])
+fi
 AC_CHECK_FUNCS([getentropy])
 AC_CACHE_CHECK([whether the freewheel noise generator will work],
 	[catacomb_cv_freewheel],
@@ -250,6 +345,9 @@ LIBS=$mdw_ORIG_LIBS
 dnl Memory locking support.
 AC_CHECK_FUNCS([mlock])
 
+dnl Set the master libraries we need.
+AC_SUBST([CATACOMB_LIBS])
+
 dnl Necessary support libraries.
 PKG_CHECK_MODULES([mLib], [mLib >= 2.2.2.1])
 AM_CFLAGS="$AM_CFLAGS $mLib_CFLAGS"