build: fix linking with coverage enabled after osx fix

After aca6fc8c3611b5e7d4faaed61e52dedf057d7219 there have been problems when
linking when having coverage enabled.
AC_SEARCH_LIBS was used wrongly here. You need function name first and lib to
link against as second argument. The symbol name also has wto leading
underscores for me.
/usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/../../../../x86_64-pc-linux-gnu/bin/ld generated: undefined
reference to `__gcov_init'

diff --git a/configure.ac b/configure.ac
index 33cd584..7fde8c3 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -327,7 +327,7 @@ EFL_CHECK_DOXYGEN([build_doc="yes"], [build_doc="no"])
 if test "${want_coverage}" = "yes" ; then
    AC_CHECK_PROG([have_lcov], [lcov], [yes], [no])
    if test "x${have_lcov}" = "xyes" ; then
-      AC_SEARCH_LIBS([gcov], [_gcov_init])
+      AC_SEARCH_LIBS([__gcov_init], [gcov])
       EFL_CHECK_COMPILER_FLAGS([EFLALL], [-fprofile-arcs -ftest-coverage])
       EFL_CHECK_COMPILER_FLAGS([EFLALL], [-fprofile-instr-generate -fcoverage-mapping])
       EFL_CHECK_LINKER_FLAGS([EFLALL], [-fprofile-instr-generate -fcoverage-mapping])