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host-cpu-c-abi: Let gl_HOST_CPU_C_ABI_32BIT never return 'unknown'
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From: |
Bruno Haible |
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Subject: |
host-cpu-c-abi: Let gl_HOST_CPU_C_ABI_32BIT never return 'unknown' |
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Date: |
Sun, 28 Jan 2024 20:26:19 +0100 |
Mohammad-Reza Nabipoor noticed that on Linux/m68k, when gl_HOST_CPU_C_ABI
has already been invoked, gl_HOST_CPU_C_ABI_32BIT reports 'unknown' instead
of the expected 'yes'. This disturbs GNU poke.
This patch fixes it.
2024-01-28 Bruno Haible <bruno@clisp.org>
host-cpu-c-abi: Let gl_HOST_CPU_C_ABI_32BIT never return 'unknown'.
Reported by Mohammad-Reza Nabipoor <mnabipoor@gnu.org>.
* m4/host-cpu-c-abi.m4 (gl_HOST_CPU_C_ABI_32BIT): Use the list of
always-32-bit CPUs and the list of always-64-bit CPUs also when
gl_HOST_CPU_C_ABI has already been run. As a fallback, use a test of
'sizeof (void *)' to always return 'yes' or 'no', never 'unknown'.
diff --git a/m4/host-cpu-c-abi.m4 b/m4/host-cpu-c-abi.m4
index 2aa413c1fd..e860a19e74 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 16
+# host-cpu-c-abi.m4 serial 17
dnl Copyright (C) 2002-2024 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -461,218 +461,66 @@ EOF
dnl Sets the HOST_CPU_C_ABI_32BIT variable to 'yes' if the C language ABI
dnl (application binary interface) is a 32-bit one, to 'no' if it is a 64-bit
-dnl one, or to 'unknown' if unknown.
+dnl one.
dnl This is a simplified variant of gl_HOST_CPU_C_ABI.
AC_DEFUN([gl_HOST_CPU_C_ABI_32BIT],
[
AC_REQUIRE([AC_CANONICAL_HOST])
AC_CACHE_CHECK([32-bit host C ABI], [gl_cv_host_cpu_c_abi_32bit],
- [if test -n "$gl_cv_host_cpu_c_abi"; then
- dnl gl_HOST_CPU_C_ABI has already been run. Use its result.
- case "$gl_cv_host_cpu_c_abi" in
- i386 | x86_64-x32 | arm | armhf | arm64-ilp32 | hppa | ia64-ilp32 |
mips | mipsn32 | powerpc | riscv*-ilp32* | s390 | sparc)
- gl_cv_host_cpu_c_abi_32bit=yes ;;
- x86_64 | alpha | arm64 | aarch64c | hppa64 | ia64 | mips64 |
powerpc64 | powerpc64-elfv2 | riscv*-lp64* | s390x | sparc64 )
- gl_cv_host_cpu_c_abi_32bit=no ;;
- *)
- gl_cv_host_cpu_c_abi_32bit=unknown ;;
- esac
- else
- case "$host_cpu" in
-
- # CPUs that only support a 32-bit ABI.
- arc \
- | bfin \
- | cris* \
- | csky \
- | epiphany \
- | ft32 \
- | h8300 \
- | m68k \
- | microblaze | microblazeel \
- | nds32 | nds32le | nds32be \
- | nios2 | nios2eb | nios2el \
- | or1k* \
- | or32 \
- | sh | sh[1234] | sh[1234]e[lb] \
- | tic6x \
- | xtensa* )
- gl_cv_host_cpu_c_abi_32bit=yes
- ;;
+ [case "$host_cpu" in
- # CPUs that only support a 64-bit ABI.
-changequote(,)dnl
- alpha | alphaev[4-8] | alphaev56 | alphapca5[67] | alphaev6[78] \
- | mmix )
-changequote([,])dnl
- gl_cv_host_cpu_c_abi_32bit=no
- ;;
+ # CPUs that only support a 32-bit ABI.
+ arc \
+ | bfin \
+ | cris* \
+ | csky \
+ | epiphany \
+ | ft32 \
+ | h8300 \
+ | m68k \
+ | microblaze | microblazeel \
+ | nds32 | nds32le | nds32be \
+ | nios2 | nios2eb | nios2el \
+ | or1k* \
+ | or32 \
+ | sh | sh[1234] | sh[1234]e[lb] \
+ | tic6x \
+ | xtensa* )
+ gl_cv_host_cpu_c_abi_32bit=yes
+ ;;
+ # CPUs that only support a 64-bit ABI.
changequote(,)dnl
- i[34567]86 )
+ alpha | alphaev[4-8] | alphaev56 | alphapca5[67] | alphaev6[78] \
+ | mmix )
changequote([,])dnl
- gl_cv_host_cpu_c_abi_32bit=yes
- ;;
-
- x86_64 )
- # 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':
x86_64-x32.
- # - 32-bit instruction set, 32-bit pointers, 32-bit 'long': i386.
- AC_COMPILE_IFELSE(
- [AC_LANG_SOURCE(
- [[#if (defined __x86_64__ || defined __amd64__ \
- || defined _M_X64 || defined _M_AMD64) \
- && !(defined __ILP32__ || defined _ILP32)
- int ok;
- #else
- error fail
- #endif
- ]])],
- [gl_cv_host_cpu_c_abi_32bit=no],
- [gl_cv_host_cpu_c_abi_32bit=yes])
- ;;
-
- arm* | aarch64 | aarch64c )
- # Assume arm with EABI.
- # On arm64 systems, the C compiler may be generating code in one of
- # these ABIs:
- # - aarch64 instruction set, 64-bit pointers, 64-bit 'long': arm64.
- # - aarch64 instruction set, 32-bit pointers, 32-bit 'long':
arm64-ilp32.
- # - 32-bit instruction set, 32-bit pointers, 32-bit 'long': arm or
armhf.
- AC_COMPILE_IFELSE(
- [AC_LANG_SOURCE(
- [[#if defined __aarch64__ && !(defined __ILP32__ || defined
_ILP32)
- int ok;
- #else
- error fail
- #endif
- ]])],
- [gl_cv_host_cpu_c_abi_32bit=no],
- [gl_cv_host_cpu_c_abi_32bit=yes])
- ;;
-
- hppa1.0 | hppa1.1 | hppa2.0* | hppa64 )
- # On hppa, the C compiler may be generating 32-bit code or 64-bit
- # code. In the latter case, it defines _LP64 and __LP64__.
- AC_COMPILE_IFELSE(
- [AC_LANG_SOURCE(
- [[#ifdef __LP64__
- int ok;
- #else
- error fail
- #endif
- ]])],
- [gl_cv_host_cpu_c_abi_32bit=no],
- [gl_cv_host_cpu_c_abi_32bit=yes])
- ;;
-
- ia64* )
- # On ia64 on HP-UX, the C compiler may be generating 64-bit code or
- # 32-bit code. In the latter case, it defines _ILP32.
- AC_COMPILE_IFELSE(
- [AC_LANG_SOURCE(
- [[#ifdef _ILP32
- int ok;
- #else
- error fail
- #endif
- ]])],
- [gl_cv_host_cpu_c_abi_32bit=yes],
- [gl_cv_host_cpu_c_abi_32bit=no])
- ;;
-
- mips* )
- # We should also check for (_MIPS_SZPTR == 64), but gcc keeps this
- # at 32.
- AC_COMPILE_IFELSE(
- [AC_LANG_SOURCE(
- [[#if defined _MIPS_SZLONG && (_MIPS_SZLONG == 64)
- int ok;
- #else
- error fail
- #endif
- ]])],
- [gl_cv_host_cpu_c_abi_32bit=no],
- [gl_cv_host_cpu_c_abi_32bit=yes])
- ;;
-
- powerpc* )
- # 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. And on powerpc-ibm-aix systems, the C compiler may
- # be generating 64-bit code.
- AC_COMPILE_IFELSE(
- [AC_LANG_SOURCE(
- [[#if defined __powerpc64__ || defined __LP64__
- int ok;
- #else
- error fail
- #endif
- ]])],
- [gl_cv_host_cpu_c_abi_32bit=no],
- [gl_cv_host_cpu_c_abi_32bit=yes])
- ;;
-
- rs6000 )
- gl_cv_host_cpu_c_abi_32bit=yes
- ;;
-
- riscv32 | riscv64 )
- # There are 6 ABIs: ilp32, ilp32f, ilp32d, lp64, lp64f, lp64d.
- # Size of 'long' and 'void *':
- AC_COMPILE_IFELSE(
- [AC_LANG_SOURCE(
- [[#if defined __LP64__
- int ok;
- #else
- error fail
- #endif
- ]])],
- [gl_cv_host_cpu_c_abi_32bit=no],
- [gl_cv_host_cpu_c_abi_32bit=yes])
- ;;
-
- s390* )
- # On s390x, the C compiler may be generating 64-bit (= s390x) code
- # or 31-bit (= s390) code.
- AC_COMPILE_IFELSE(
- [AC_LANG_SOURCE(
- [[#if defined __LP64__ || defined __s390x__
- int ok;
- #else
- error fail
- #endif
- ]])],
- [gl_cv_host_cpu_c_abi_32bit=no],
- [gl_cv_host_cpu_c_abi_32bit=yes])
- ;;
+ gl_cv_host_cpu_c_abi_32bit=no
+ ;;
- sparc | sparc64 )
- # UltraSPARCs running Linux have `uname -m` = "sparc64", but the
- # C compiler still generates 32-bit code.
+ *)
+ if test -n "$gl_cv_host_cpu_c_abi"; then
+ dnl gl_HOST_CPU_C_ABI has already been run. Use its result.
+ case "$gl_cv_host_cpu_c_abi" in
+ i386 | x86_64-x32 | arm | armhf | arm64-ilp32 | hppa | ia64-ilp32
| mips | mipsn32 | powerpc | riscv*-ilp32* | s390 | sparc)
+ gl_cv_host_cpu_c_abi_32bit=yes ;;
+ x86_64 | alpha | arm64 | aarch64c | hppa64 | ia64 | mips64 |
powerpc64 | powerpc64-elfv2 | riscv*-lp64* | s390x | sparc64 )
+ gl_cv_host_cpu_c_abi_32bit=no ;;
+ *)
+ gl_cv_host_cpu_c_abi_32bit=unknown ;;
+ esac
+ else
+ gl_cv_host_cpu_c_abi_32bit=unknown
+ fi
+ if test $gl_cv_host_cpu_c_abi_32bit = unknown; then
AC_COMPILE_IFELSE(
[AC_LANG_SOURCE(
- [[#if defined __sparcv9 || defined __arch64__
- int ok;
- #else
- error fail
- #endif
+ [[int test_pointer_size[sizeof (void *) - 5];
]])],
[gl_cv_host_cpu_c_abi_32bit=no],
[gl_cv_host_cpu_c_abi_32bit=yes])
- ;;
-
- *)
- gl_cv_host_cpu_c_abi_32bit=unknown
- ;;
- esac
- fi
+ fi
+ ;;
+ esac
])
HOST_CPU_C_ABI_32BIT="$gl_cv_host_cpu_c_abi_32bit"
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Bruno Haible <=