target-supports.exp

来自「linux下编程用 编译软件」· EXP 代码 · 共 1,508 行 · 第 1/4 页

       # conflicts with invocations for multiple testsuites.
       set opts "additional_flags=-static"
       set src static[pid].f
       set exe static[pid].x

       set f [open $src "w"]
       puts $f "      print *, 'test'"
       puts $f "      end"
       close $f

       verbose "check_effective_target_static_libgfortran compiling testfile $src" 2
       set lines [${tool}_target_compile $src $exe executable "$opts"]
       file delete $src

       if [string match "" $lines] then {
           # No error message, compilation succeeded.
           set et_static_libgfortran_saved 1
       }
    }

    return $et_static_libgfortran_saved
}

# Return 1 if the target supports executing AltiVec instructions, 0
# otherwise.  Cache the result.

proc check_vmx_hw_available { } {
    global vmx_hw_available_saved
    global tool

    if [info exists vmx_hw_available_saved] {
	verbose "check_hw_available  returning saved $vmx_hw_available_saved" 2
    } else {
	set vmx_hw_available_saved 0

	# Some simulators are known to not support VMX instructions.
	if { [istarget powerpc-*-eabi] || [istarget powerpc*-*-eabispe] } {
	    verbose "check_hw_available  returning 0" 2
	    return $vmx_hw_available_saved
	}

	# Set up, compile, and execute a test program containing VMX
	# instructions.  Include the current process ID in the file
	# names to prevent conflicts with invocations for multiple
	# testsuites.
	set src vmx[pid].c
	set exe vmx[pid].x

	set f [open $src "w"]
	puts $f "int main() {"
	puts $f "#ifdef __MACH__"
	puts $f "  asm volatile (\"vor v0,v0,v0\");"
	puts $f "#else"
	puts $f "  asm volatile (\"vor 0,0,0\");"
	puts $f "#endif"
	puts $f "  return 0; }"
	close $f

	# Most targets don't require special flags for this test case, but
	# Darwin does.
	if [istarget *-*-darwin*] {
	  set opts "additional_flags=-maltivec"
	} else {
	  set opts ""
	}

	verbose "check_vmx_hw_available  compiling testfile $src" 2
	set lines [${tool}_target_compile $src $exe executable "$opts"]
	file delete $src

	if [string match "" $lines] then {
	    # No error message, compilation succeeded.
	    set result [${tool}_load "./$exe" "" ""]
	    set status [lindex $result 0]
	    remote_file build delete $exe
	    verbose "check_vmx_hw_available testfile status is <$status>" 2

	    if { $status == "pass" } then {
		set vmx_hw_available_saved 1
	    }
	} else {
	    verbose "check_vmx_hw_availalble testfile compilation failed" 2
	}
    }

    return $vmx_hw_available_saved
}

# GCC 3.4.0 for powerpc64-*-linux* included an ABI fix for passing
# complex float arguments.  This affects gfortran tests that call cabsf
# in libm built by an earlier compiler.  Return 1 if libm uses the same
# argument passing as the compiler under test, 0 otherwise.
#
# When the target name changes, replace the cached result.

proc check_effective_target_broken_cplxf_arg { } {
    global et_broken_cplxf_arg_saved
    global et_broken_cplxf_arg_target_name
    global tool

    # Skip the work for targets known not to be affected.
    if { ![istarget powerpc64-*-linux*] } {
	return 0
    } elseif { [is-effective-target ilp32] } {
	return 0
    }

    if { ![info exists et_broken_cplxf_arg_target_name] } {
	set et_broken_cplxf_arg_target_name ""
    }

    # If the target has changed since we set the cached value, clear it.
    set current_target [current_target_name]
    if { $current_target != $et_broken_cplxf_arg_target_name } {
	verbose "check_effective_target_broken_cplxf_arg: `$et_broken_cplxf_arg_target_name'" 2
	set et_broken_cplxf_arg_target_name $current_target
	if [info exists et_broken_cplxf_arg_saved] {
	    verbose "check_effective_target_broken_cplxf_arg: removing cached result" 2
	    unset et_broken_cplxf_arg_saved
	}
    }

    if [info exists et_broken_cplxf_arg_saved] {
	verbose "check_effective_target_broken_cplxf_arg: using cached result" 2
    } else {
	set et_broken_cplxf_arg_saved 0
	# This is only known to affect one target.
	if { ![istarget powerpc64-*-linux*] || ![is-effective-target lp64] } {
	    set et_broken_cplxf_arg_saved 0
	    verbose "check_effective_target_broken_cplxf_arg: caching 0" 2
	    return $et_broken_cplxf_arg_saved
	}

	# Set up, compile, and execute a C test program that calls cabsf.
	set src cabsf[pid].c
	set exe cabsf[pid].x

	set f [open $src "w"]
	puts $f "#include <complex.h>"
	puts $f "extern void abort (void);"
	puts $f "float fabsf (float);"
	puts $f "float cabsf (_Complex float);"
	puts $f "int main ()"
	puts $f "{"
	puts $f "  _Complex float cf;"
	puts $f "  float f;"
	puts $f "  cf = 3 + 4.0fi;"
	puts $f "  f = cabsf (cf);"
	puts $f "  if (fabsf (f - 5.0) > 0.0001) abort ();"
	puts $f "  return 0;"
	puts $f "}"
	close $f

	set lines [${tool}_target_compile $src $exe executable "-lm"]
	file delete $src

	if [string match "" $lines] {
	    # No error message, compilation succeeded.
	    set result [${tool}_load "./$exe" "" ""]
	    set status [lindex $result 0]
	    remote_file build delete $exe

	    verbose "check_effective_target_broken_cplxf_arg: status is <$status>" 2

	    if { $status != "pass" } {
		set et_broken_cplxf_arg_saved 1
	    }
	} else {
	    verbose "check_effective_target_broken_cplxf_arg: compilation failed" 2
	}
    }
    return $et_broken_cplxf_arg_saved
}

proc check_alpha_max_hw_available { } {
    global alpha_max_hw_available_saved
    global tool

    if [info exists alpha_max_hw_available_saved] {
	verbose "check_alpha_max_hw_available returning saved $alpha_max_hw_available_saved" 2
    } else {
	set alpha_max_hw_available_saved 0

	# Set up, compile, and execute a test program probing bit 8 of the
	# architecture mask, which indicates presence of MAX instructions.
	set src max[pid].c
	set exe max[pid].x

	set f [open $src "w"]
	puts $f "int main() { return __builtin_alpha_amask(1<<8) != 0; }"
	close $f

	verbose "check_alpha_max_hw_available compiling testfile $src" 2
	set lines [${tool}_target_compile $src $exe executable ""]
	file delete $src

	if [string match "" $lines] then {
	    # No error message, compilation succeeded.
	    set result [${tool}_load "./$exe" "" ""]
	    set status [lindex $result 0]
	    remote_file build delete $exe
	    verbose "check_alpha_max_hw_available testfile status is <$status>" 2

	    if { $status == "pass" } then {
		set alpha_max_hw_available_saved 1
	    }
	} else {
	    verbose "check_alpha_max_hw_availalble testfile compilation failed" 2
	}
    }

    return $alpha_max_hw_available_saved
}

# Returns true iff the FUNCTION is available on the target system.
# (This is essentially a Tcl implementation of Autoconf's
# AC_CHECK_FUNC.)

proc check_function_available { function } {
    set var "${function}_available_saved"
    global $var
    global tool

    if {![info exists $var]} {
	# Assume it exists.
	set $var 1
	# Check to make sure.
	set src "function[pid].c"
	set exe "function[pid].exe"

	set f [open $src "w"]
	puts $f "int main () { $function (); }"
	close $f

	set lines [${tool}_target_compile $src $exe executable ""]
	file delete $src
	file delete $exe

	if {![string match "" $lines]} then {
	    set $var 0
	    verbose -log "$function is not available"
	} else {
	    verbose -log "$function is available"
	}
    }

    eval return \$$var
}

# Returns true iff "fork" is available on the target system.

proc check_fork_available {} {
    return [check_function_available "fork"]
}

# Returns true iff "mkfifo" is available on the target system.

proc check_mkfifo_available {} {
    if {[istarget *-*-cygwin*]} {
       # Cygwin has mkfifo, but support is incomplete.
       return 0
     }

    return [check_function_available "mkfifo"]
}

# Return 1 if we're generating 32-bit code using default options, 0
# otherwise.
#
# When the target name changes, replace the cached result.

proc check_effective_target_ilp32 { } {
    global et_ilp32_saved
    global et_ilp32_target_name

    if { ![info exists et_ilp32_target_name] } {
	set et_ilp32_target_name ""
    }

    # If the target has changed since we set the cached value, clear it.
    set current_target [current_target_name]
    if { $current_target != $et_ilp32_target_name } {
	verbose "check_effective_target_ilp32: `$et_ilp32_target_name' `$current_target'" 2
	set et_ilp32_target_name $current_target
	if { [info exists et_ilp32_saved] } {
	    verbose "check_effective_target_ilp32: removing cached result" 2
	    unset et_ilp32_saved
	}
    }

    if [info exists et_ilp32_saved] {
	verbose "check-effective_target_ilp32: using cached result" 2
    } else {
	verbose "check_effective_target_ilp32: compiling source" 2
	set et_ilp32_saved [string match "" [get_compiler_messages ilp32 object {
	    int dummy[(sizeof (int) == 4 && sizeof (void *) == 4 && sizeof (long) == 4 ) ? 1 : -1];
	}]]
    }
    verbose "check_effective_target_ilp32: returning $et_ilp32_saved" 2
    return $et_ilp32_saved
}

# Return 1 if we're generating 64-bit code using default options, 0
# otherwise.
#
# When the target name changes, replace the cached result.

proc check_effective_target_lp64 { } {
    global et_lp64_saved
    global et_lp64_target_name

    if { ![info exists et_lp64_target_name] } {
	set et_lp64_target_name ""
    }

    # If the target has changed since we set the cached value, clear it.
    set current_target [current_target_name]
    if { $current_target != $et_lp64_target_name } {
	verbose "check_effective_target_lp64: `$et_lp64_target_name' `$current_target'" 2
	set et_lp64_target_name $current_target
	if [info exists et_lp64_saved] {
	    verbose "check_effective_target_lp64: removing cached result" 2
	    unset et_lp64_saved
	}
    }

    if [info exists et_lp64_saved] {
	verbose "check_effective_target_lp64: using cached result" 2
    } else {
	verbose "check_effective_target_lp64: compiling source" 2
	set et_lp64_saved [string match "" [get_compiler_messages lp64 object {
	    int dummy[(sizeof (int) == 4 && sizeof (void *) == 8 && sizeof (long) == 8 ) ? 1 : -1];
	}]]
    }
    verbose "check_effective_target_lp64: returning $et_lp64_saved" 2
    return $et_lp64_saved
}

# Return 1 if the target needs a command line argument to enable a SIMD
# instruction set.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_cmdline_needed { } {
    global et_vect_cmdline_needed_saved

    if [info exists et_vect_cmdline_needed_saved] {
	verbose "check_effective_target_vect_cmdline_needed: using cached result" 2
    } else {
	set et_vect_cmdline_needed_saved 1
	if { [istarget ia64-*-*]
	      || [istarget x86_64-*-*] } {
	   set et_vect_cmdline_needed_saved 0
	}
    }

    verbose "check_effective_target_vect_cmdline_needed: returning $et_vect_cmdline_needed_saved" 2
    return $et_vect_cmdline_needed_saved
}

# Return 1 if the target supports hardware vectors of int, 0 otherwise.
#
# This won't change for different subtargets so cache the result.

proc check_effective_target_vect_int { } {
    global et_vect_int_saved

    if [info exists et_vect_int_saved] {
	verbose "check_effective_target_vect_int: using cached result" 2
    } else {
	set et_vect_int_saved 0
	if { [istarget i?86-*-*]
	      || [istarget powerpc*-*-*]
	      || [istarget x86_64-*-*]
	      || [istarget sparc*-*-*]
	      || [istarget alpha*-*-*]
	      || [istarget ia64-*-*] } {