diff options
Diffstat (limited to 'configure')
| -rwxr-xr-x | configure | 104 |
1 files changed, 100 insertions, 4 deletions
diff --git a/configure b/configure index 09807732067..ed9eaf50170 100755 --- a/configure +++ b/configure @@ -1757,13 +1757,16 @@ fi ac_fn_c_check_decl () { as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack - as_decl_name=`echo $2|sed 's/ *(.*//'` + # Initialize each $ac_[]_AC_LANG_ABBREV[]_decl_warn_flag once. + as_decl_name=`echo $2|sed 's/ *(.*//'` as_decl_use=`echo $2|sed -e 's/(/((/' -e 's/)/) 0&/' -e 's/,/) 0& (/g'` { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $as_decl_name is declared" >&5 $as_echo_n "checking whether $as_decl_name is declared... " >&6; } if eval \${$3+:} false; then : $as_echo_n "(cached) " >&6 else + ac_save_werror_flag=$ac_c_werror_flag + ac_c_werror_flag="$ac_c_decl_warn_flag$ac_c_werror_flag" cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ $4 @@ -1788,6 +1791,7 @@ else eval "$3=no" fi rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext + ac_c_werror_flag=$ac_save_werror_flag fi eval ac_res=\$$3 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5 @@ -4807,11 +4811,100 @@ fi test -n "$AWK" && break done +# The Clang compiler raises a warning for an undeclared identifier that matches +# a compiler builtin function. All extant Clang versions are affected, as of +# Clang 3.6.0. Test a builtin known to every version. This problem affects the +# C and Objective C languages, but Clang does report an error under C++ and +# Objective C++. +# +# Passing -fno-builtin to the compiler would suppress this problem. That +# strategy would have the advantage of being insensitive to stray warnings, but +# it would make tests less realistic. +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how $CC reports undeclared, standard C functions" >&5 +$as_echo_n "checking how $CC reports undeclared, standard C functions... " >&6; } +if ${ac_cv_c_decl_report+:} false; then : + $as_echo_n "(cached) " >&6 +else + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +int +main () +{ +(void) strchr; + ; + return 0; +} +_ACEOF +if ac_fn_c_try_compile "$LINENO"; then : + if test -s conftest.err; then : + # For AC_CHECK_DECL to react to warnings, the compiler must be silent on + # valid AC_CHECK_DECL input. No library function is consistently available + # on freestanding implementations, so test against a dummy declaration. + # Include always-available headers on the off chance that they somehow + # elicit warnings. + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#include <float.h> +#include <limits.h> +#include <stdarg.h> +#include <stddef.h> +extern void ac_decl (int, char *); +int +main () +{ +#ifdef __cplusplus + (void) ac_decl ((int) 0, (char *) 0); + (void) ac_decl; +#else + (void) ac_decl; +#endif + + ; + return 0; +} +_ACEOF +if ac_fn_c_try_compile "$LINENO"; then : + if test -s conftest.err; then : + { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5 +$as_echo "$as_me: error: in \`$ac_pwd':" >&2;} +as_fn_error $? "cannot detect from compiler exit status or warnings +See \`config.log' for more details" "$LINENO" 5; } +else + ac_cv_c_decl_report=warning +fi +else + { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5 +$as_echo "$as_me: error: in \`$ac_pwd':" >&2;} +as_fn_error $? "cannot compile a simple declaration test +See \`config.log' for more details" "$LINENO" 5; } +fi +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext +else + { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5 +$as_echo "$as_me: error: in \`$ac_pwd':" >&2;} +as_fn_error $? "compiler does not report undeclared identifiers +See \`config.log' for more details" "$LINENO" 5; } +fi +else + ac_cv_c_decl_report=error +fi +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_decl_report" >&5 +$as_echo "$ac_cv_c_decl_report" >&6; } + +case $ac_cv_c_decl_report in + warning) ac_c_decl_warn_flag=yes ;; + *) ac_c_decl_warn_flag= ;; +esac + if test "$with_llvm" = yes; then : + if test -z "$LLVM_CONFIG"; then for ac_prog in llvm-config llvm-config-7 llvm-config-6.0 llvm-config-5.0 llvm-config-4.0 llvm-config-3.9 do @@ -5067,7 +5160,8 @@ _ACEOF -fi + +fi # fi unset CFLAGS @@ -15036,7 +15130,8 @@ esac # posix_fadvise() is a no-op on Solaris, so don't incur function overhead # by calling it, 2009-04-02 # http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/lib/libc/port/gen/posix_fadvise.c -if test "$PORTNAME" != "solaris"; then +if test "$PORTNAME" != "solaris"; then : + for ac_func in posix_fadvise do : ac_fn_c_check_func "$LINENO" "posix_fadvise" "ac_cv_func_posix_fadvise" @@ -15060,7 +15155,8 @@ cat >>confdefs.h <<_ACEOF #define HAVE_DECL_POSIX_FADVISE $ac_have_decl _ACEOF -fi + +fi # fi ac_fn_c_check_decl "$LINENO" "fdatasync" "ac_cv_have_decl_fdatasync" "#include <unistd.h> " |