#!/bin/sh
+# Generate the cflags script, which is used to determine what cflags
+# to pass to the compiler.
+# We create a temporary test c program and repeatedly compile it with
+# various candidate flags, and from the compiler output, determine what
+# flags are supported.
+# From this we initialise the following variables in the cflags script:
+#
+# $warn
+# $stdflags
+# $extra
+# $_exe
+
case $PERL_CONFIG_SH in
'')
if test -f config.sh; then TOP=.;
. $TOP/config.sh
;;
esac
-: This forces SH files to create target in same directory as SH file.
-: This is so that make depend always knows where to find SH derivatives.
+# This forces SH files to create target in same directory as SH file.
+# This is so that make depend always knows where to find SH derivatives.
case "$0" in
*/*) cd `expr X$0 : 'X\(.*\)/'` ;;
esac
case " $ccflags " in
*" $opt "*) ;; # Skip if already there.
*) rm -f _cflags$_exe
- case "`$cc -DPERL_NO_INLINE_FUNCTIONS $cflags $warn $stdflags $opt _cflags.c -o _cflags$_exe 2>&1`" in
+ case "`$cc -DPERL_NO_INLINE_FUNCTIONS $ccflags $warn $stdflags $opt _cflags.c -o _cflags$_exe 2>&1`" in
*"unrecognized"*) ;;
*"implicit declaration"*) ;; # Was something useful hidden?
*"Invalid"*) ;;
extra=''
echo "Extracting cflags (with variable substitutions)"
-: This section of the file will have variable substitutions done on it.
-: Move anything that needs config subs from !NO!SUBS! section to !GROK!THIS!.
-: Protect any dollar signs and backticks that you do not want interpreted
-: by putting a backslash in front. You may delete these comments.
+# This section of the file will have variable substitutions done on it.
+# Move anything that needs config subs from !NO!SUBS! section to !GROK!THIS!.
+# Protect any dollar signs and backticks that you do not want interpreted
+# by putting a backslash in front. You may delete these comments.
rm -f cflags
$spitshell >cflags <<!GROK!THIS!
$startsh
+# !!!!!!! DO NOT EDIT THIS FILE !!!!!!!
+
+# This file is generated by cflags.SH
+
+
# Extra warnings, used e.g. for gcc.
warn="$warn"
# Extra standardness.
!GROK!THIS!
-: In the following dollars and backticks do not need the extra backslash.
+# In the following dollars and backticks do not need the extra backslash.
$spitshell >>cflags <<'!NO!SUBS!'
case $PERL_CONFIG_SH in
'')
;;
esac
-: syntax: cflags [optimize=XXX] [file[.suffix]]
-: displays the compiler command line for file
+# syntax: cflags [optimize=XXX] [file[.suffix]] ...
+# displays the proposed compiler command line for each 'file'
+#
+# with no file, dispalys it for all *.c files.
+# The optimise=XXX arg (if present) is evalled, setting the default
+# value of the $optimise variable, which is output on the command line
+# (but which may be overridden for specific files below)
case "X$1" in
Xoptimize=*|X"optimize=*")
;;
esac
-also=': '
-case $# in
-1) also='echo 1>&2 " CCCMD = "'
-esac
-
case $# in
0) set *.c; echo "The current C flags are:" ;;
esac
*) echo $n " $file.c $c" ;;
esac
- : allow variables like toke_cflags to be evaluated
+ # allow variables like toke_cflags to be evaluated
if echo $file | grep -v / >/dev/null
then
eval 'eval ${'"${file}_cflags"'-""}'
fi
- : or customize here
+ # or customize here
case "$file" in
*) ;;
- *) : Customization examples follow: ;;
+ # Customization examples follow:
av) ccflags=`echo $ccflags | sed -e s/-pipe//` ;;
deb) ccflags="$ccflags -fno-jump-tables" ;;
hv) warn=`echo $warn | sed -e s/-Wextra//` ;;
toke) optimize=-O0 ;;
esac
- : The examples are intentionally unreachable as the '*)' case always
- : matches. To use them, move before the '*)' and edit as appropriate.
- : It is not a good idea to set ccflags to an absolute value here, as it
- : often contains general -D defines which are needed for correct
- : compilation. It is better to edit ccflags as shown, using interpolation
- : to add flags, or sed to remove flags.
+ # The examples are intentionally unreachable as the '*)' case always
+ # matches. To use them, move before the '*)' and edit as appropriate.
+ # It is not a good idea to set ccflags to an absolute value here, as it
+ # often contains general -D defines which are needed for correct
+ # compilation. It is better to edit ccflags as shown, using interpolation
+ # to add flags, or sed to remove flags.
case "$cc" in
esac
done
;;
+ *)
+ # clang may not be called clang
+ case "`$cc -v 2>&1`" in
+ *clang*)
+ case "$warn" in
+ *-Wno-unused-value) ;;
+ *) warn="$warn -Wno-unused-value"
+ esac
+ esac
esac
- : Can we perhaps use $ansi2knr here
+ # Can we perhaps use $ansi2knr here
echo "$cc -c -DPERL_CORE $ccflags $stdflags $optimize $warn $extra"
- eval "$also "'"$cc -DPERL_CORE -c $ccflags $stdflags $optimize $warn $extra"'
. $TOP/config.sh
https://perl5.git.perl.org / perl5.git / blobdiff