1
2dnl Macro to add --enable-coverage option (disabled by default) and add
3dnl appropriate compiler flags to permit usage of gcov if that option is
4dnl enabled.  If WRAPPER_xFLAGS variables are set then the flags will also be
5dnl added to those variables.
6dnl
7dnl Sets "pac_cv_use_coverage=yes" and AC_DEFINEs USE_COVERAGE if coverage was
8dnl successfully enabled.  Also creates an AM_CONDITIONAL with the name
9dnl "BUILD_COVERAGE" that is true iff pac_cv_use_coverage=yes.
10dnl
11dnl Usage: PAC_CONFIG_SUBDIR_ARGS
12dnl
13dnl Assumes that all of the compiler macros have already been invoked
14dnl (AC_PROG_CC and friends).
15AC_DEFUN([PAC_ENABLE_COVERAGE],[
16
17AC_ARG_VAR([GCOV],[name/path for the gcov utility])
18AC_CHECK_PROGS([GCOV],[gcov])
19
20AC_ARG_ENABLE([coverage],
21              [AC_HELP_STRING([--enable-coverage],
22                              [Turn on coverage analysis using gcc and gcov])],
23              [],[enable_coverage=no])
24
25if test "$enable_coverage" = "yes" ; then
26    if test "$ac_cv_prog_gcc" = "yes" ; then
27        CFLAGS="$CFLAGS -fprofile-arcs -ftest-coverage"
28        if test ${WRAPPER_CFLAGS+set} = set ; then
29            WRAPPER_CFLAGS="$WRAPPER_CFLAGS -fprofile-arcs -ftest-coverage"
30        fi
31    else
32        AC_MSG_WARN([--enable-coverage only supported for GCC])
33    fi
34    if test "$enable_cxx" = "yes" ; then
35        if test "$ac_cv_cxx_compiler_gnu" = "yes" ; then
36            CXXFLAGS="$CXXFLAGS -fprofile-arcs -ftest-coverage"
37            if test ${WRAPPER_CXXFLAGS+set} = set ; then
38                WRAPPER_CXXFLAGS="$WRAPPER_CXXFLAGS -fprofile-arcs -ftest-coverage"
39            fi
40        else
41            AC_MSG_WARN([--enable-coverage only supported for GCC])
42        fi
43    fi
44    # Add similar options for g77 so that the Fortran tests will also
45    #
46    if test "$enable_f77" = yes ; then
47        if test "$ac_cv_f77_compiler_gnu" = "yes" ; then
48             FFLAGS="$FFLAGS -fprofile-arcs -ftest-coverage"
49             if test ${WRAPPER_FFLAGS+set} = set ; then
50                 WRAPPER_FFLAGS="$WRAPPER_FFLAGS -fprofile-arcs -ftest-coverage"
51             fi
52        else
53            AC_MSG_WARN([--enable-coverage only supported for G77/GFORTRAN])
54        fi
55    fi
56    if test "$enable_fc" = yes ; then
57        if test "$ac_cv_fc_compiler_gnu" = "yes" ; then
58             FCFLAGS="$FCFLAGS -fprofile-arcs -ftest-coverage"
59             if test ${WRAPPER_FCFLAGS+set} = set ; then
60                 WRAPPER_FCFLAGS="$WRAPPER_FCFLAGS -fprofile-arcs -ftest-coverage"
61             fi
62        else
63            AC_MSG_WARN([--enable-coverage only supported for GFORTRAN])
64        fi
65    fi
66    # On some platforms (e.g., Mac Darwin), we must also *link*
67    # with the -fprofile-args -ftest-coverage option.
68    AC_MSG_CHECKING([whether compilation with coverage analysis enabled works])
69    AC_LINK_IFELSE([AC_LANG_SOURCE([int main(int argc, char **argv){return 1;}])],
70                   [AC_MSG_RESULT([yes])],
71                   [AC_MSG_RESULT([no])
72                    AC_MSG_ERROR([Unable to link programs when coverage analysis enabled])])
73
74    # Test for the routines that we need to use to ensure that the
75    # data files are (usually) written out
76    # FIXME: Some versions of Linux provide usleep, but it rounds times
77    # up to the next second (!)
78    AC_CHECK_FUNCS([usleep])
79
80    # NOTE: using a "pac_cv_" prefix but not caching because of xFLAGS "side effects"
81    pac_cv_use_coverage=yes
82    AC_DEFINE([USE_COVERAGE],[1],[Define if performing coverage tests])
83fi
84AM_CONDITIONAL([BUILD_COVERAGE],[test "X$pac_cv_use_coverage" = "Xyes"])
85])
86
87