diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 54 |
1 files changed, 29 insertions, 25 deletions
diff --git a/configure.ac b/configure.ac index b65c1b0..b77d803 100644 --- a/configure.ac +++ b/configure.ac @@ -110,32 +110,36 @@ AM_CONDITIONAL([CARES_LT_SHLIB_USE_NO_UNDEFINED], AM_CONDITIONAL([CARES_LT_SHLIB_USE_MIMPURE_TEXT], [test "x$xc_lt_shlib_use_mimpure_text" = 'xyes']) +# +# Due to libtool and automake machinery limitations of not allowing +# specifying separate CPPFLAGS or CFLAGS when compiling objects for +# inclusion of these in shared or static libraries, we are forced to +# build using separate configure runs for shared and static libraries +# on systems where different CPPFLAGS or CFLAGS are mandatory in order +# to compile objects for each kind of library. Notice that relying on +# the '-DPIC' CFLAG that libtool provides is not valid given that the +# user might for example choose to build static libraries with PIC. +# -AC_MSG_CHECKING([if we need CARES_BUILDING_LIBRARY]) -use_cppflag_cares_building_library="no" -use_cppflag_cares_staticlib="no" -CPPFLAG_CARES_STATICLIB="" -case $host in - *-*-mingw*) - AC_MSG_RESULT(yes) - use_cppflag_cares_building_library="yes" - AC_MSG_CHECKING([if we need CARES_STATICLIB]) - if test "X$enable_shared" = "Xno" - then - AC_MSG_RESULT(yes) - use_cppflag_cares_staticlib="yes" - CPPFLAG_CARES_STATICLIB="-DCARES_STATICLIB" - else - AC_MSG_RESULT(no) - fi - ;; - *) - AC_MSG_RESULT(no) - ;; -esac -AM_CONDITIONAL(USE_CPPFLAG_CARES_BUILDING_LIBRARY, test x$use_cppflag_cares_building_library = xyes) -AM_CONDITIONAL(USE_CPPFLAG_CARES_STATICLIB, test x$use_cppflag_cares_staticlib = xyes) -AC_SUBST(CPPFLAG_CARES_STATICLIB) +# +# Make our Makefile.am files use the staticlib CPPFLAG only when strictly +# targeting a static library and not building its shared counterpart. +# + +AM_CONDITIONAL([USE_CPPFLAG_CARES_STATICLIB], + [test "x$xc_lt_build_static_only" = 'xyes']) + +# +# Make staticlib CPPFLAG variable and its definition visible in output +# files unconditionally, providing an empty definition unless strictly +# targeting a static library and not building its shared counterpart. +# + +CPPFLAG_CARES_STATICLIB= +if test "x$xc_lt_build_static_only" = 'xyes'; then + CPPFLAG_CARES_STATICLIB='-DCARES_STATICLIB' +fi +AC_SUBST([CPPFLAG_CARES_STATICLIB]) dnl ********************************************************************** dnl platform/compiler/architecture specific checks/flags |