diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 47 |
1 files changed, 44 insertions, 3 deletions
diff --git a/configure.ac b/configure.ac index cf621835..97010df4 100644 --- a/configure.ac +++ b/configure.ac @@ -21,6 +21,26 @@ SAVED_CFLAGS="$CFLAGS" SAVED_CPPFLAGS="$CPPFLAGS" SAVED_LDFLAGS="$LDFLAGS" +# Is this oss-fuzz build? +AC_ARG_ENABLE( + fuzzing, + AC_HELP_STRING(--enable-fuzzing, build fuzzers) +) +AC_ARG_VAR( + FUZZING_LIBS, + AC_HELP_STRING(libraries to link fuzzing targets with) +) + +# Set up convenient fuzzing defaults before initializing compiler. +if test "x$enable_fuzzing" = xyes; then + AC_DEFINE(NEED_FUZZING) + test "x$CC" == x && CC=clang + test "x$FUZZING_LIBS" == x && \ + FUZZING_LIBS="-fsanitize=fuzzer" + test "x$SAVED_CFLAGS" == x && \ + AM_CFLAGS="-g -fsanitize=fuzzer-no-link,address" +fi + # Set up the compiler in two different ways and say yes we may want to install. AC_PROG_CC AM_PROG_CC_C_O @@ -54,8 +74,11 @@ if test "x$enable_static" = xyes; then LDFLAGS="$AM_LDFLAGS $SAVED_LDFLAGS" fi +# Do we need fuzzers? +AM_CONDITIONAL(NEED_FUZZING, test "x$enable_fuzzing" = xyes) + # Is this gcc? -AM_CONDITIONAL(IS_GCC, test "x$GCC" = xyes) +AM_CONDITIONAL(IS_GCC, test "x$GCC" = xyes -a "x$enable_fuzzing" != xyes) # Is this Sun CC? AC_EGREP_CPP( @@ -117,8 +140,6 @@ AC_REPLACE_FUNCS([ \ getline \ getprogname \ memmem \ - recallocarray \ - reallocarray \ setenv \ setproctitle \ strcasestr \ @@ -130,6 +151,26 @@ AC_REPLACE_FUNCS([ \ ]) AC_FUNC_STRNLEN +# Clang sanitizers wrap reallocarray even if it isn't available on the target +# system. When compiled it always returns NULL and crashes the program. To +# detect this we need a more complicated test. +AC_MSG_CHECKING([for working reallocarray]) +AC_RUN_IFELSE([AC_LANG_PROGRAM( + [#include <stdlib.h>], + [return (reallocarray(NULL, 1, 1) == NULL);] + )], + AC_MSG_RESULT(yes), + [AC_LIBOBJ(reallocarray) AC_MSG_RESULT([no])] +) +AC_MSG_CHECKING([for working recallocarray]) +AC_RUN_IFELSE([AC_LANG_PROGRAM( + [#include <stdlib.h>], + [return (recallocarray(NULL, 1, 1, 1) == NULL);] + )], + AC_MSG_RESULT(yes), + [AC_LIBOBJ(recallocarray) AC_MSG_RESULT([no])] +) + # Look for clock_gettime. Must come before event_init. AC_SEARCH_LIBS(clock_gettime, rt) |