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| | From 8b8c768e3c701ed1993789bb46acb8a12c7a93df Mon Sep 17 00:00:00 2001
From: Flavio Cruz <flaviocruz@gmail.com>
Date: Sun, 18 Dec 2022 19:46:15 -0500
Subject: [PATCH] Force use of -ffreestanding when checking for gnumach headers
Without this ./configure assumes that we are in a fully hosted
environment, which might not be the case. After this patch, we can rely on
the freestanding header files provided by GCC such as stdint.h.
Message-Id: <Y5+0V9osFc/zXMq0@mars>
---
sysdeps/mach/configure | 8 +++++++-
sysdeps/mach/configure.ac | 6 ++++++
2 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/sysdeps/mach/configure b/sysdeps/mach/configure
index 739f1028a46..36f556a6639 100644
--- a/sysdeps/mach/configure
+++ b/sysdeps/mach/configure
@@ -133,6 +133,8 @@ if test -n "$sysheaders"; then
fi
### Sanity checks for Mach header installation
+old_CFLAGS=$CFLAGS
+CFLAGS="$CFLAGS -ffreestanding"
ac_fn_c_check_header_preproc "$LINENO" "mach/mach_types.h" "ac_cv_header_mach_mach_types_h"
@@ -143,6 +145,7 @@ else
fi
+CFLAGS=$old_CFLAGS
ac_fn_c_check_header_preproc "$LINENO" "mach/mach_types.defs" "ac_cv_header_mach_mach_types_defs"
if test "x$ac_cv_header_mach_mach_types_defs" = xyes; then :
@@ -216,7 +219,9 @@ $as_echo_n "checking for creation_time in task_basic_info... " >&6; }
if ${libc_cv_mach_task_creation_time+:} false; then :
$as_echo_n "(cached) " >&6
else
- cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ old_CFLAGS=$CFLAGS
+CFLAGS="$CFLAGS -ffreestanding"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <mach/task_info.h>
int
@@ -242,6 +247,7 @@ $as_echo "$libc_cv_mach_task_creation_time" >&6; }
if test $libc_cv_mach_task_creation_time = no; then
as_fn_error $? "you need Mach headers supporting task_info.creation_time" "$LINENO" 5
fi
+CFLAGS=$old_CFLAGS
mach_interface_list=
for ifc in mach mach4 gnumach \
diff --git a/sysdeps/mach/configure.ac b/sysdeps/mach/configure.ac
index 61b00d66b10..5816c3d4ad4 100644
--- a/sysdeps/mach/configure.ac
+++ b/sysdeps/mach/configure.ac
@@ -12,8 +12,11 @@ if test -n "$sysheaders"; then
fi
### Sanity checks for Mach header installation
+old_CFLAGS=$CFLAGS
+CFLAGS="$CFLAGS -ffreestanding"
AC_CHECK_HEADER(mach/mach_types.h,,
[AC_MSG_ERROR([cannot find Mach headers])], -)
+CFLAGS=$old_CFLAGS
AC_CHECK_HEADER(mach/mach_types.defs,, [dnl
AC_MSG_ERROR([cannot find Mach .defs files])], -)
@@ -42,6 +45,8 @@ dnl The creation_time field is a GNU Mach addition the other variants lack.
dnl
AC_CACHE_CHECK(for creation_time in task_basic_info,
libc_cv_mach_task_creation_time, [dnl
+old_CFLAGS=$CFLAGS
+CFLAGS="$CFLAGS -ffreestanding"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <mach/task_info.h>]], [[
extern struct task_basic_info *i;
long s = i->creation_time.seconds;
@@ -49,6 +54,7 @@ long s = i->creation_time.seconds;
if test $libc_cv_mach_task_creation_time = no; then
AC_MSG_ERROR([you need Mach headers supporting task_info.creation_time])
fi
+CFLAGS=$old_CFLAGS
dnl
dnl The Darwin variant no longer has <mach/mach.defs>
|