From e6fd904737bbe8ff7970f40ae41b8760ec1f00d4 Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Fri, 8 Mar 1996 23:57:44 +0000 Subject: [PATCH] (-lm check): If $GCC, append -fno-builtin to $CC for just this test. --- configure.in | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/configure.in b/configure.in index 617fbe6a690..790ecec8f4e 100644 --- a/configure.in +++ b/configure.in @@ -1369,7 +1369,13 @@ AC_FUNC_ALLOCA # fmod, logb, and frexp are found in -lm on most systems. # On HPUX 9.01, -lm does not contain logb, so check for sqrt. -AC_CHECK_LIB(m, sqrt(0.0) + t) +old_CC="$CC" +# GCC's implicit prototype for its built-in `sqrt' function conflicts +# with autoconf's call, so disable the built-in function. +test x$GCC = xyes && CC="$CC -fno-builtin" +AC_CHECK_LIB(m, sqrt) +CC="$old_CC" + AC_CHECK_FUNCS(gettimeofday gethostname dup2 rename closedir mkdir rmdir \ random lrand48 bcopy bcmp logb frexp fmod ftime res_init setsid \ strerror fpathconf select mktime eaccess getpagesize tzset) -- 2.39.2