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refactoring of COMPILER_BASIC_OPTS

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pull/1/head
Yang Tse 17 years ago
parent 94d2a28698
commit ce7c807846
1 changed files with 164 additions and 67 deletions
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  1. 231
      m4/cares-compilers.m4

231
m4/cares-compilers.m4
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@ -129,7 +129,7 @@ AC_DEFUN([CARES_CHECK_COMPILER_HP], [
CURL_CHECK_DEF([__HP_cc], [], [silent])
if test "$curl_cv_have_def___HP_cc" = "yes"; then
AC_MSG_RESULT([yes])
compiler_id="HPC"
compiler_id="HPUXC"
flags_dbg_all="-g -s"
flags_dbg_yes="-g"
flags_dbg_off="-s"
@ -235,6 +235,64 @@ AC_DEFUN([CARES_CHECK_COMPILER_SUN], [
])
dnl CARES_COMPILER_WORKS_IFELSE ([ACTION-IF-WORKS], [ACTION-IF-NOT-WORKS])
dnl -------------------------------------------------
dnl Verify if the C compiler seems to work with the
dnl settings that are 'active' at the time the test
dnl is performed.
AC_DEFUN([CARES_COMPILER_WORKS_IFELSE], [
dnl compilation capability verification
tmp_compiler_works="unknown"
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
]],[[
int i = 1;
return i;
]])
],[
tmp_compiler_works="yes"
],[
tmp_compiler_works="no"
])
dnl linking capability verification
if test "$tmp_compiler_works" = "yes"; then
AC_LINK_IFELSE([
AC_LANG_PROGRAM([[
]],[[
int i = 1;
return i;
]])
],[
tmp_compiler_works="yes"
],[
tmp_compiler_works="no"
])
fi
dnl only do runtime verification when not cross-compiling
if test "x$cross_compiling" != "xyes" &&
test "$tmp_compiler_works" = "yes"; then
AC_RUN_IFELSE([
AC_LANG_PROGRAM([[
]],[[
int i = 0;
exit(i);
]])
],[
tmp_compiler_works="yes"
],[
tmp_compiler_works="no"
])
fi
dnl branch upon test result
if test "$tmp_compiler_works" = "yes"; then
ifelse($1,,:,[$1])
ifelse($2,,,[else
$2])
fi
])
dnl CARES_SET_COMPILER_BASIC_OPTS
dnl -------------------------------------------------
dnl Sets compiler specific options/flags which do not
@ -244,57 +302,108 @@ dnl options.
AC_DEFUN([CARES_SET_COMPILER_BASIC_OPTS], [
AC_REQUIRE([CARES_CHECK_COMPILER])dnl
#
if test "$compiler_id" = "DECC"; then
dnl Select strict ANSI C compiler mode
CFLAGS="$CFLAGS -std1"
dnl Turn off optimizer ANSI C aliasing rules
CFLAGS="$CFLAGS -noansi_alias"
dnl Generate warnings for missing function prototypes
CFLAGS="$CFLAGS -warnprotos"
dnl Change some warnings into fatal errors
CFLAGS="$CFLAGS -msg_fatal toofewargs,toomanyargs"
fi
#
if test "$compiler_id" = "HPC"; then
dnl Disallow run-time dereferencing of null pointers
CFLAGS="$CFLAGS -z"
fi
#
if test "$compiler_id" = "IBMC"; then
dnl Ensure that compiler optimizations are always thread-safe.
CFLAGS="$CFLAGS -qthreaded"
dnl Disable type based strict aliasing optimizations, using worst
dnl case aliasing assumptions when compiling. Type based aliasing
dnl would restrict the lvalues that could be safely used to access
dnl a data object.
CFLAGS="$CFLAGS -qnoansialias"
dnl Force compiler to stop after the compilation phase, without
dnl generating an object code file when compilation has errors.
CFLAGS="$CFLAGS -qhalt=e"
fi
#
if test "$compiler_id" = "ICC_unix"; then
dnl On unix this compiler uses gcc's header files, so
dnl we select ANSI C89 dialect plus GNU extensions.
CPPFLAGS="$CPPFLAGS -std=gnu89"
dnl Change some warnings into errors
dnl #140: too many arguments in function call
dnl #147: declaration is incompatible with 'previous one'
dnl #165: too few arguments in function call
dnl #266: function declared implicitly
CPPFLAGS="$CPPFLAGS -we 140,147,165,266"
dnl Disable some remarks
dnl #279: controlling expression is constant
dnl #981: operands are evaluated in unspecified order
dnl #1469: "cc" clobber ignored
if test "$compiler_num" -lt "910"; then
CPPFLAGS="$CPPFLAGS -wd 279"
if test "$compiler_id" != "unknown"; then
#
tmp_save_CPPFLAGS="$CPPFLAGS"
tmp_save_CFLAGS="$CFLAGS"
tmp_CPPFLAGS=""
tmp_CFLAGS=""
#
case "$compiler_id" in
#
DECC)
#
dnl Select strict ANSI C compiler mode
tmp_CFLAGS="$tmp_CFLAGS -std1"
dnl Turn off optimizer ANSI C aliasing rules
tmp_CFLAGS="$tmp_CFLAGS -noansi_alias"
dnl Generate warnings for missing function prototypes
tmp_CFLAGS="$tmp_CFLAGS -warnprotos"
dnl Change some warnings into fatal errors
tmp_CFLAGS="$tmp_CFLAGS -msg_fatal toofewargs,toomanyargs"
;;
#
GNUC)
#
dnl Placeholder
tmp_CFLAGS="$tmp_CFLAGS"
;;
#
HPUXC)
#
dnl Placeholder
tmp_CFLAGS="$tmp_CFLAGS"
;;
#
IBMC)
#
dnl Ensure that compiler optimizations are always thread-safe.
tmp_CFLAGS="$tmp_CFLAGS -qthreaded"
dnl Disable type based strict aliasing optimizations, using worst
dnl case aliasing assumptions when compiling. Type based aliasing
dnl would restrict the lvalues that could be safely used to access
dnl a data object.
tmp_CFLAGS="$tmp_CFLAGS -qnoansialias"
dnl Force compiler to stop after the compilation phase, without
dnl generating an object code file when compilation has errors.
tmp_CFLAGS="$tmp_CFLAGS -qhalt=e"
;;
#
ICC_unix)
#
dnl On unix this compiler uses gcc's header files, so
dnl we select ANSI C89 dialect plus GNU extensions.
tmp_CPPFLAGS="$tmp_CPPFLAGS -std=gnu89"
dnl Change some warnings into errors
dnl #140: too many arguments in function call
dnl #147: declaration is incompatible with 'previous one'
dnl #165: too few arguments in function call
dnl #266: function declared implicitly
tmp_CPPFLAGS="$tmp_CPPFLAGS -we 140,147,165,266"
dnl Disable some remarks
dnl #279: controlling expression is constant
dnl #981: operands are evaluated in unspecified order
dnl #1469: "cc" clobber ignored
tmp_CPPFLAGS="$tmp_CPPFLAGS -wd 279,981,1469"
dnl Disable use of ANSI C aliasing rules in optimizations
tmp_CFLAGS="$tmp_CFLAGS -no-ansi-alias"
dnl Disable floating point optimizations
tmp_CFLAGS="$tmp_CFLAGS -fp-model precise"
;;
#
ICC_windows)
#
dnl Placeholder
tmp_CFLAGS="$tmp_CFLAGS"
;;
#
SUNC)
#
dnl Placeholder
tmp_CFLAGS="$tmp_CFLAGS"
;;
#
esac
#
tmp_CPPFLAGS=`eval echo $tmp_CPPFLAGS`
tmp_CFLAGS=`eval echo $tmp_CFLAGS`
#
if test ! -z "$tmp_CFLAGS" || test ! -z "$tmp_CPPFLAGS"; then
AC_MSG_CHECKING([if compiler accepts some basic options])
CPPFLAGS=`eval echo $tmp_save_CPPFLAGS $tmp_CPPFLAGS`
CFLAGS=`eval echo $tmp_save_CFLAGS $tmp_CFLAGS`
CARES_COMPILER_WORKS_IFELSE([
AC_MSG_RESULT([yes])
AC_MSG_NOTICE([compiler options added: $tmp_CFLAGS $tmp_CPPFLAGS])
],[
AC_MSG_RESULT([no])
AC_MSG_NOTICE([compiler options rejected: $tmp_CFLAGS $tmp_CPPFLAGS])
dnl restore initial settings
CPPFLAGS="$tmp_save_CPPFLAGS"
CFLAGS="$tmp_save_CFLAGS"
])
fi
CPPFLAGS="$CPPFLAGS -wd 981,1469"
dnl Disable use of ANSI C aliasing rules in optimizations
CFLAGS="$CFLAGS -no-ansi-alias"
dnl Disable floating point optimizations
CFLAGS="$CFLAGS -fp-model precise"
#
fi
])
@ -324,13 +433,7 @@ AC_DEFUN([CARES_SET_COMPILER_DEBUG_OPTS], [
CFLAGS="$CFLAGS $flags_dbg_off"
AC_MSG_CHECKING([if compiler accepts debug disabling flags $flags_dbg_off])
fi
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
]],[[
int i = 1;
return i;
]])
],[
CARES_COMPILER_WORKS_IFELSE([
AC_MSG_RESULT([yes])
],[
AC_MSG_RESULT([no])
@ -398,13 +501,7 @@ AC_DEFUN([CARES_SET_COMPILER_OPTIMIZE_OPTS], [
CFLAGS="$CFLAGS $flags_opt_off"
AC_MSG_CHECKING([if compiler accepts optimizer disabling flags $flags_opt_off])
fi
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
]],[[
int i = 1;
return i;
]])
],[
CARES_COMPILER_WORKS_IFELSE([
AC_MSG_RESULT([yes])
],[
AC_MSG_RESULT([no])
@ -492,7 +589,7 @@ AC_DEFUN([CARES_SET_COMPILER_WARNING_OPTS], [
fi
fi
#
if test "$compiler_id" = "HPC"; then
if test "$compiler_id" = "HPUXC"; then
if test "$want_warnings" = "yes"; then
dnl Issue all warnings
CFLAGS="$CFLAGS +w1"
@ -597,7 +694,7 @@ AC_DEFUN([CARES_VAR_MATCH_IFELSE], [
if test "$ac_var_match_word" = "yes"; then
ifelse($3,,:,[$3])
ifelse($4,,,[else
[$4]])
$4])
fi
])

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