[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
host-cpu-c-abi update
From: |
Bruno Haible |
Subject: |
host-cpu-c-abi update |
Date: |
Mon, 16 Jan 2017 22:11:15 +0100 |
User-agent: |
KMail/4.8.5 (Linux/3.8.0-44-generic; KDE/4.8.5; x86_64; ; ) |
The 'host-cpu-c-abi' module (which is used by GNU libffcall) does not know
about some ABIs that have appeared in the last few years. This fixes it.
2017-01-16 Bruno Haible <address@hidden>
host-cpu-c-abi: Add support for armhf, arm64, x32, s390x.
* m4/host-cpu-c-abi.m4 (gl_HOST_CPU_C_ABI): Require gl_C_ASM. On x86_64
systems, distinguish x86_64 and x32. On arm systems, distinguish arm,
armhf, arm64, and no longer distinguish arm and armel. On s390x systems,
distinguish s390 and s390x.
* modules/host-cpu-c-abi (Files): Add m4/asm-underscore.m4.
* NEWS: Mention the change regarding 'armel'.
diff --git a/NEWS b/NEWS
index 791bcaf..90ce1a2 100644
--- a/NEWS
+++ b/NEWS
@@ -42,6 +42,9 @@ User visible incompatible changes
Date Modules Changes
+2017-01-16 host-cpu-c-abi On ARM platforms, HOST_CPU_C_ABI is now set to
+ 'arm' or 'armhf' instead of 'armel'.
+
2017-01-15 localeinfo Change case_folded_counterparts's first arg's type
from wchar_t to wint_t, so it now accepts WEOF.
diff --git a/m4/host-cpu-c-abi.m4 b/m4/host-cpu-c-abi.m4
index 229cf07..e408f08 100644
--- a/m4/host-cpu-c-abi.m4
+++ b/m4/host-cpu-c-abi.m4
@@ -1,4 +1,4 @@
-# host-cpu-c-abi.m4 serial 1
+# host-cpu-c-abi.m4 serial 2
dnl Copyright (C) 2002-2017 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -46,6 +46,7 @@ dnl See
<http://en.wikipedia.org/wiki/X86_instruction_listings>.
AC_DEFUN([gl_HOST_CPU_C_ABI],
[
AC_REQUIRE([AC_CANONICAL_HOST])
+ AC_REQUIRE([gl_C_ASM])
AC_CACHE_CHECK([host CPU and C ABI], [gl_cv_host_cpu_c_abi],
[case "$host_cpu" in
@@ -56,13 +57,23 @@ changequote([,])dnl
;;
x86_64 )
- # On x86_64 systems, the C compiler may still be generating
- # 32-bit code.
+ # On x86_64 systems, the C compiler may be generating code in one of
+ # these ABIs:
+ # - 64-bit instruction set, 64-bit pointers, 64-bit 'long': x86_64.
+ # - 64-bit instruction set, 64-bit pointers, 32-bit 'long': x86_64
+ # with native Windows (mingw, MSVC).
+ # - 64-bit instruction set, 32-bit pointers, 32-bit 'long': x32.
+ # - 32-bit instruction set, 32-bit pointers, 32-bit 'long': i386.
AC_EGREP_CPP([yes],
- [#if defined __LP64__ || defined __x86_64__ || defined __amd64__
+ [#if defined __x86_64__ || defined __amd64__ || defined _M_X64 ||
defined _M_AMD64
yes
#endif],
- [gl_cv_host_cpu_c_abi=x86_64],
+ [AC_EGREP_CPP([yes],
+ [#if defined __ILP32__ || defined _ILP32
+ yes
+ #endif],
+ [gl_cv_host_cpu_c_abi=x32],
+ [gl_cv_host_cpu_c_abi=x86_64])],
[gl_cv_host_cpu_c_abi=i386])
;;
@@ -73,12 +84,35 @@ changequote([,])dnl
;;
arm* )
+ # Assume arm with EABI.
+ # On arm64, the C compiler may be generating 64-bit (= aarch64) code
+ # or 32-bit (= arm) code.
AC_EGREP_CPP([yes],
- [#if defined __ARMEL__
+ [#if defined(__aarch64__) || defined(__ARM_64BIT_STATE) ||
defined(__ARM_PCS_AAPCS64)
yes
#endif],
- [gl_cv_host_cpu_c_abi=armel],
- [gl_cv_host_cpu_c_abi=arm])
+ [gl_cv_host_cpu_c_abi=arm64],
+ [# Don't distinguish little-endian and big-endian arm, since they
+ # don't require different machine code for simple operations and
+ # since the user can distinguish them through the preprocessot
+ # defines __ARMEL__ vs. __ARMEB__.
+ # But distinguish arm which passes floating-point arguments and
+ # return values in integer registers (r0, r1, ...) - this is
+ # gcc -mfloat-abi=soft or gcc -mfloat-abi=softfp - from arm which
+ # passes them in float registers (s0, s1, ...) and double registers
+ # (d0, d1, ...) - rhis is gcc -mfloat-abi=hard. GCC 4.6 or newer
+ # sets the preprocessor defines __ARM_PCS (for the first case) and
+ # __ARM_PCS_VFP (for the second case), but older GCC does not.
+ echo 'double ddd; void func (double dd) { ddd = dd; }' > conftest.c
+ # Look for a reference to the register d0 in the .s file.
+ AC_TRY_COMMAND(${CC-cc} $CFLAGS $CPPFLAGS $gl_c_asm_opt
conftest.c) >/dev/null 2>&1
+ if LC_ALL=C grep -E 'd0,' conftest.$gl_asmext >/dev/null; then
+ gl_cv_host_cpu_c_abi=armhf
+ else
+ gl_cv_host_cpu_c_abi=arm
+ fi
+ rm -f conftest*
+ ])
;;
hppa1.0 | hppa1.1 | hppa2.0* | hppa64 )
@@ -107,6 +141,9 @@ changequote([,])dnl
;;
powerpc64 )
+ # Different ABIs are in use on AIX vs. Mac OS X vs. Linux,*BSD.
+ # No need to distinguish them here; the caller may distinguish
+ # them based on the OS.
# On powerpc64 systems, the C compiler may still be generating
# 32-bit code.
AC_EGREP_CPP([yes],
@@ -121,7 +158,16 @@ changequote([,])dnl
gl_cv_host_cpu_c_abi=powerpc
;;
- # TODO: Distinguish s390 and s390x correctly.
+ s390* )
+ # On s390x, the C compiler may be generating 64-bit (= s390x) code
+ # or 31-bit (= s390) code.
+ AC_EGREP_CPP([yes],
+ [#if defined(__LP64__) || defined(__s390x__)
+ yes
+ #endif],
+ [gl_cv_host_cpu_c_abi=s390x],
+ [gl_cv_host_cpu_c_abi=s390])
+ ;;
sparc | sparc64 )
# UltraSPARCs running Linux have `uname -m` = "sparc64", but the
@@ -154,6 +200,9 @@ EOF
#ifndef __i386__
#undef __i386__
#endif
+#ifndef __x32__
+#undef __x32__
+#endif
#ifndef __x86_64__
#undef __x86_64__
#endif
@@ -163,8 +212,11 @@ EOF
#ifndef __arm__
#undef __arm__
#endif
-#ifndef __armel__
-#undef __armel__
+#ifndef __armhf__
+#undef __armhf__
+#endif
+#ifndef __arm64__
+#undef __arm64__
#endif
#ifndef __hppa__
#undef __hppa__
diff --git a/modules/host-cpu-c-abi b/modules/host-cpu-c-abi
index a9011c5..6c92cc4 100644
--- a/modules/host-cpu-c-abi
+++ b/modules/host-cpu-c-abi
@@ -3,6 +3,7 @@ Determine canonical name of CPU and C ABI.
Files:
m4/host-cpu-c-abi.m4
+m4/asm-underscore.m4
Depends-on:
[Prev in Thread] |
Current Thread |
[Next in Thread] |
- host-cpu-c-abi update,
Bruno Haible <=