diff options
Diffstat (limited to 'lib/replace/libreplace_macros.m4')
| -rw-r--r-- | lib/replace/libreplace_macros.m4 | 332 |
1 files changed, 332 insertions, 0 deletions
diff --git a/lib/replace/libreplace_macros.m4 b/lib/replace/libreplace_macros.m4 new file mode 100644 index 0000000000..1856eacf66 --- /dev/null +++ b/lib/replace/libreplace_macros.m4 @@ -0,0 +1,332 @@ +# +# This is a collection of useful autoconf macros +# + +############################################ +# Check if the compiler handles c99 struct initialization, and if not try -AC99 and -c99 flags +# Usage: LIBREPLACE_C99_STRUCT_INIT(success-action,failure-action) +# changes CFLAGS to add -AC99 or -c99 if needed +AC_DEFUN([LIBREPLACE_C99_STRUCT_INIT], +[ +saved_CFLAGS="$CFLAGS"; +c99_init=no +if test x"$c99_init" = x"no"; then + AC_MSG_CHECKING(for C99 designated initializers) + CFLAGS="$saved_CFLAGS"; + AC_TRY_COMPILE([#include <stdio.h>], + [ struct foo {int x;char y;}; + struct foo bar = { .y = 'X', .x = 1 }; + ], + [AC_MSG_RESULT(yes); c99_init=yes],[AC_MSG_RESULT(no)]) +fi +if test x"$c99_init" = x"no"; then + AC_MSG_CHECKING(for C99 designated initializers with -AC99) + CFLAGS="$saved_CFLAGS -AC99"; + AC_TRY_COMPILE([#include <stdio.h>], + [ struct foo {int x;char y;}; + struct foo bar = { .y = 'X', .x = 1 }; + ], + [AC_MSG_RESULT(yes); c99_init=yes],[AC_MSG_RESULT(no)]) +fi +if test x"$c99_init" = x"no"; then + AC_MSG_CHECKING(for C99 designated initializers with -qlanglvl=extc99) + CFLAGS="$saved_CFLAGS -qlanglvl=extc99"; + AC_TRY_COMPILE([#include <stdio.h>], + [ struct foo {int x;char y;}; + struct foo bar = { .y = 'X', .x = 1 }; + ], + [AC_MSG_RESULT(yes); c99_init=yes],[AC_MSG_RESULT(no)]) +fi +if test x"$c99_init" = x"no"; then + AC_MSG_CHECKING(for C99 designated initializers with -qlanglvl=stdc99) + CFLAGS="$saved_CFLAGS -qlanglvl=stdc99"; + AC_TRY_COMPILE([#include <stdio.h>], + [ struct foo {int x;char y;}; + struct foo bar = { .y = 'X', .x = 1 }; + ], + [AC_MSG_RESULT(yes); c99_init=yes],[AC_MSG_RESULT(no)]) +fi +if test x"$c99_init" = x"no"; then + AC_MSG_CHECKING(for C99 designated initializers with -c99) + CFLAGS="$saved_CFLAGS -c99" + AC_TRY_COMPILE([#include <stdio.h>], + [ struct foo {int x;char y;}; + struct foo bar = { .y = 'X', .x = 1 }; + ], + [AC_MSG_RESULT(yes); c99_init=yes],[AC_MSG_RESULT(no)]) +fi + +if test "`uname`" = "HP-UX"; then + if test "$ac_cv_c_compiler_gnu" = no; then + # special override for broken HP-UX compiler - I can't find a way to test + # this properly (its a compiler bug) + CFLAGS="$CFLAGS -AC99"; + c99_init=yes; + fi +fi + +if test x"$c99_init" = x"yes"; then + saved_CFLAGS="" + $1 +else + CFLAGS="$saved_CFLAGS" + saved_CFLAGS="" + $2 +fi +]) + +dnl AC_PROG_CC_FLAG(flag) +AC_DEFUN(AC_PROG_CC_FLAG, +[AC_CACHE_CHECK(whether ${CC-cc} accepts -$1, ac_cv_prog_cc_$1, +[echo 'void f(){}' > conftest.c +if test -z "`${CC-cc} -$1 -c conftest.c 2>&1`"; then + ac_cv_prog_cc_$1=yes +else + ac_cv_prog_cc_$1=no +fi +rm -f conftest* +])]) + +dnl see if a declaration exists for a function or variable +dnl defines HAVE_function_DECL if it exists +dnl AC_HAVE_DECL(var, includes) +AC_DEFUN(AC_HAVE_DECL, +[ + AC_CACHE_CHECK([for $1 declaration],ac_cv_have_$1_decl,[ + AC_TRY_COMPILE([$2],[int i = (int)$1], + ac_cv_have_$1_decl=yes,ac_cv_have_$1_decl=no)]) + if test x"$ac_cv_have_$1_decl" = x"yes"; then + AC_DEFINE([HAVE_]translit([$1], [a-z], [A-Z])[_DECL],1,[Whether $1() is available]) + fi +]) + + +# AC_CHECK_LIB_EXT(LIBRARY, [EXT_LIBS], [FUNCTION], +# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], +# [ADD-ACTION-IF-FOUND],[OTHER-LIBRARIES]) +# ------------------------------------------------------ +# +# Use a cache variable name containing both the library and function name, +# because the test really is for library $1 defining function $3, not +# just for library $1. Separate tests with the same $1 and different $3s +# may have different results. +# +# Note that using directly AS_VAR_PUSHDEF([ac_Lib], [ac_cv_lib_$1_$3]) +# is asking for trouble, since AC_CHECK_LIB($lib, fun) would give +# ac_cv_lib_$lib_fun, which is definitely not what was meant. Hence +# the AS_LITERAL_IF indirection. +# +# FIXME: This macro is extremely suspicious. It DEFINEs unconditionally, +# whatever the FUNCTION, in addition to not being a *S macro. Note +# that the cache does depend upon the function we are looking for. +# +# It is on purpose we used `ac_check_lib_ext_save_LIBS' and not just +# `ac_save_LIBS': there are many macros which don't want to see `LIBS' +# changed but still want to use AC_CHECK_LIB_EXT, so they save `LIBS'. +# And ``ac_save_LIBS' is too tempting a name, so let's leave them some +# freedom. +AC_DEFUN([AC_CHECK_LIB_EXT], +[ +AH_CHECK_LIB_EXT([$1]) +ac_check_lib_ext_save_LIBS=$LIBS +LIBS="-l$1 $$2 $7 $LIBS" +AS_LITERAL_IF([$1], + [AS_VAR_PUSHDEF([ac_Lib_ext], [ac_cv_lib_ext_$1])], + [AS_VAR_PUSHDEF([ac_Lib_ext], [ac_cv_lib_ext_$1''])])dnl + +m4_ifval([$3], + [ + AH_CHECK_FUNC_EXT([$3]) + AS_LITERAL_IF([$1], + [AS_VAR_PUSHDEF([ac_Lib_func], [ac_cv_lib_ext_$1_$3])], + [AS_VAR_PUSHDEF([ac_Lib_func], [ac_cv_lib_ext_$1''_$3])])dnl + AC_CACHE_CHECK([for $3 in -l$1], ac_Lib_func, + [AC_TRY_LINK_FUNC($3, + [AS_VAR_SET(ac_Lib_func, yes); + AS_VAR_SET(ac_Lib_ext, yes)], + [AS_VAR_SET(ac_Lib_func, no); + AS_VAR_SET(ac_Lib_ext, no)]) + ]) + AS_IF([test AS_VAR_GET(ac_Lib_func) = yes], + [AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_$3))])dnl + AS_VAR_POPDEF([ac_Lib_func])dnl + ],[ + AC_CACHE_CHECK([for -l$1], ac_Lib_ext, + [AC_TRY_LINK_FUNC([main], + [AS_VAR_SET(ac_Lib_ext, yes)], + [AS_VAR_SET(ac_Lib_ext, no)]) + ]) + ]) +LIBS=$ac_check_lib_ext_save_LIBS + +AS_IF([test AS_VAR_GET(ac_Lib_ext) = yes], + [m4_default([$4], + [AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_LIB$1)) + case "$$2" in + *-l$1*) + ;; + *) + $2="-l$1 $$2" + ;; + esac]) + [$6] + ], + [$5])dnl +AS_VAR_POPDEF([ac_Lib_ext])dnl +])# AC_CHECK_LIB_EXT + +# AH_CHECK_LIB_EXT(LIBNAME) +# --------------------- +m4_define([AH_CHECK_LIB_EXT], +[AH_TEMPLATE(AS_TR_CPP(HAVE_LIB$1), + [Define to 1 if you have the `]$1[' library (-l]$1[).])]) + +dnl AC_SEARCH_LIBS_EXT(FUNCTION, SEARCH-LIBS, EXT_LIBS, +dnl [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], +dnl [OTHER-LIBRARIES]) +dnl -------------------------------------------------------- +dnl Search for a library defining FUNC, if it's not already available. +AC_DEFUN([AC_SEARCH_LIBS_EXT], +[AC_CACHE_CHECK([for library containing $1], [ac_cv_search_ext_$1], +[ +ac_func_search_ext_save_LIBS=$LIBS +ac_cv_search_ext_$1=no +AC_LINK_IFELSE([AC_LANG_CALL([], [$1])], + [ac_cv_search_ext_$1="none required"]) +if test "$ac_cv_search_ext_$1" = no; then + for ac_lib in $2; do + LIBS="-l$ac_lib $$3 $6 $ac_func_search_save_ext_LIBS" + AC_LINK_IFELSE([AC_LANG_CALL([], [$1])], + [ac_cv_search_ext_$1="-l$ac_lib" +break]) + done +fi +LIBS=$ac_func_search_ext_save_LIBS]) +AS_IF([test "$ac_cv_search_ext_$1" != no], + [test "$ac_cv_search_ext_$1" = "none required" || $3="$ac_cv_search_ext_$1 $$3" + $4], + [$5])dnl +]) + +dnl check for a function in a $LIBS and $OTHER_LIBS libraries variable. +dnl AC_CHECK_FUNC_EXT(func,OTHER_LIBS,IF-TRUE,IF-FALSE) +AC_DEFUN([AC_CHECK_FUNC_EXT], +[ + AH_CHECK_FUNC_EXT($1) + ac_check_func_ext_save_LIBS=$LIBS + LIBS="$2 $LIBS" + AS_VAR_PUSHDEF([ac_var], [ac_cv_func_ext_$1])dnl + AC_CACHE_CHECK([for $1], ac_var, + [AC_LINK_IFELSE([AC_LANG_FUNC_LINK_TRY([$1])], + [AS_VAR_SET(ac_var, yes)], + [AS_VAR_SET(ac_var, no)])]) + LIBS=$ac_check_func_ext_save_LIBS + AS_IF([test AS_VAR_GET(ac_var) = yes], + [AC_DEFINE_UNQUOTED(AS_TR_CPP([HAVE_$1])) $3], + [$4])dnl +AS_VAR_POPDEF([ac_var])dnl +])# AC_CHECK_FUNC + +# AH_CHECK_FUNC_EXT(FUNCNAME) +# --------------------- +m4_define([AH_CHECK_FUNC_EXT], +[AH_TEMPLATE(AS_TR_CPP(HAVE_$1), + [Define to 1 if you have the `]$1[' function.])]) + +dnl Define an AC_DEFINE with ifndef guard. +dnl AC_N_DEFINE(VARIABLE [, VALUE]) +AC_DEFUN([AC_N_DEFINE], +[ +AH_VERBATIM([$1], [ +#ifndef $1 +# undef $1 +#endif +]) + + cat >>confdefs.h <<\EOF +#ifndef $1 +[#define] $1 m4_if($#, 1, 1, [$2]) +#endif +EOF +]) + +dnl Add an #include +dnl AC_ADD_INCLUDE(VARIABLE) +define(AC_ADD_INCLUDE, +[cat >> confdefs.h <<\EOF +[#include] $1 +EOF +]) + +dnl remove an #include +dnl AC_REMOVE_INCLUDE(VARIABLE) +define(AC_REMOVE_INCLUDE, +[ +grep -v '[#include] $1' confdefs.h >confdefs.h.tmp +cat confdefs.h.tmp > confdefs.h +rm confdefs.h.tmp +]) + +dnl remove an #define +dnl AC_REMOVE_DEFINE(VARIABLE) +define(AC_REMOVE_DEFINE, +[ +grep -v '[#define] $1 ' confdefs.h |grep -v '[#define] $1[$]'>confdefs.h.tmp +cat confdefs.h.tmp > confdefs.h +rm confdefs.h.tmp +]) + +dnl AS_HELP_STRING is not available in autoconf 2.57, and AC_HELP_STRING is deprecated +dnl in autoconf 2.59, so define AS_HELP_STRING to be AC_HELP_STRING unless it is already +dnl defined. +m4_ifdef([AS_HELP_STRING], , [m4_define([AS_HELP_STRING], m4_defn([AC_HELP_STRING]))]) + +dnl check if the prototype in the header matches the given one +dnl AC_VERIFY_C_PROTOTYPE(prototype,functionbody,[IF-TRUE].[IF-FALSE],[extraheaders]) +AC_DEFUN(AC_VERIFY_C_PROTOTYPE, +[AC_CACHE_CHECK([for prototype $1], AS_TR_SH([ac_cv_c_prototype_$1]), + AC_COMPILE_IFELSE([AC_LANG_SOURCE([ + AC_INCLUDES_DEFAULT + $5 + $1 + { + $2 + } + ])],[ + AS_TR_SH([ac_cv_c_prototype_$1])=yes + ],[ + AS_TR_SH([ac_cv_c_prototype_$1])=no + ]) +) +AS_IF([test $AS_TR_SH([ac_cv_c_prototype_$1]) = yes],[$3],[$4]) +]) + +AC_DEFUN(LIBREPLACE_PROVIDE_HEADER, +[AC_CHECK_HEADER([$1], + [ AC_CONFIG_COMMANDS(rm-$1, [rm -f $libreplacedir/$1], [libreplacedir=$libreplacedir]) ], + [ AC_CONFIG_COMMANDS(mk-$1, [echo "#include \"replace.h\"" > $libreplacedir/$1], [libreplacedir=$libreplacedir]) ] + ) +]) + +dnl AC_HAVE_TYPE(TYPE,INCLUDES) +AC_DEFUN([AC_HAVE_TYPE], [ +AC_REQUIRE([AC_HEADER_STDC]) +cv=`echo "$1" | sed 'y%./+- %__p__%'` +AC_MSG_CHECKING(for $1) +AC_CACHE_VAL([ac_cv_type_$cv], +AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ +AC_INCLUDES_DEFAULT +$2]], +[[$1 foo;]])], +[eval "ac_cv_type_$cv=yes"], +[eval "ac_cv_type_$cv=no"]))dnl +ac_foo=`eval echo \\$ac_cv_type_$cv` +AC_MSG_RESULT($ac_foo) +if test "$ac_foo" = yes; then + ac_tr_hdr=HAVE_`echo $1 | sed 'y%abcdefghijklmnopqrstuvwxyz./- %ABCDEFGHIJKLMNOPQRSTUVWXYZ____%'` +if false; then + AC_CHECK_TYPES($1) +fi + AC_DEFINE_UNQUOTED($ac_tr_hdr, 1, [Define if you have type `$1']) +fi +]) |