buildlib/tools.m4

   1 # tl_CHECK_TOOL_PREFIX will work _BEFORE_ AC_CANONICAL_HOST, etc., has been
   2 # called. It should be called again after these have been called.
   3 #
   4 # Basically we want to check if the host alias specified by the user is
   5 # different from the build alias. The rules work like this:-
   6 #
   7 # If host is not specified, it defaults to NONOPT
   8 # If build is not specified, it defaults to NONOPT
   9 # If nonopt is not specified, we guess all other values
  10
  11 dnl Replace AC_CHECK_TOOL_PREFIX
  12 undefine([AC_CHECK_TOOL_PREFIX])
  13 define([AC_CHECK_TOOL_PREFIX], [tl_CHECK_TOOL_PREFIX])
  14
  15 AC_DEFUN(tl_CHECK_TOOL_PREFIX,
  16 [AC_PROVIDE([AC_CHECK_TOOL_PREFIX])
  17 AC_BEFORE([AC_CANONICAL_HOST])
  18 AC_BEFORE([AC_CANONICAL_BUILD])
  19 dnl Quick check
  20 if test "$host_alias" = ""; then
  21   if test $host = NONE; then
  22     thost=$nonopt
  23   else
  24     thost=$host
  25   fi
  26   if test $thost != $build -a $thost != NONE; then
  27     ac_tool_prefix=${thost}-
  28     ac_tool_dir=${thost}
  29   else
  30     ac_tool_prefix=
  31     ac_tool_dir=
  32   fi
  33 else
  34   if test $host != $build; then
  35     ac_tool_prefix=${host_alias}-
  36     ac_tool_dir=${host_alias}
  37   else
  38     ac_tool_prefix=
  39     ac_tool_dir=
  40   fi
  41 fi
  42 ])
  43
  44 dnl replacement for AC_CHECK_TOOL
  45 undefine([AC_CHECK_TOOL])
  46 define([AC_CHECK_TOOL], [tl_CHECK_TOOL($1, $2, $3, $4)])
  47
  48 dnl tl_CHECK_TOOL - AC_CHECK_TOOL, with a couple of extra checks
  49 dnl tl_CHECK_TOOL(VARIABLE, PROG-TO-CHECK-FOR[, VALUE-IF-NOT-FOUND [, PATH
  50 dnl [, REJECT]])
  51 AC_DEFUN(tl_CHECK_TOOL,
  52 [AC_REQUIRE([AC_CHECK_TOOL_PREFIX])
  53 AC_CHECK_PROG($1, ${ac_tool_prefix}$2, ${ac_tool_prefix}$2,
  54               ifelse([$3], , [$2], ), $4, $5)
  55 if test -z "$ac_cv_prog_$1_dir";then ac_cv_prog_$1_dir=""; fi
  56 if test "$ac_tool_dir" != ""; then
  57   if test -z "$ac_cv_prog_$1" -a "$5" != "/usr/${ac_tool_dir}/bin/$2" -a \
  58         "$5" != "/usr/local/${ac_tool_dir}/bin/$2"; then
  59     if test -f /usr/${ac_tool_dir}/bin/$2; then $1="/usr/${ac_tool_dir}/bin/$2"; ac_cv_prog_$1_dir=/usr/${ac_tool_dir}
  60     elif test -f /usr/local/${ac_tool_dir}/bin/$2; then $1="/usr/local/${ac_tool_dir}/bin/$2"; ac_cv_prog_$1_dir=/usr/local/${ac_tool_dir}
  61     fi
  62   fi
  63 fi
  64 ifelse([$3], , , [
  65 if test -z "$ac_cv_prog_$1"; then
  66 if test -n "$ac_tool_prefix"; then
  67   AC_CHECK_PROG($1, $2, $2, $3, $4, $5)
  68 else
  69   $1="$3"
  70 fi
  71 fi])
  72 ])
  73
  74 dnl tl_CHECK_TOOLS -
  75 dnl  do a tl_CHECK_TOOL for multiple tools (like AC_CHECK_PROGS)
  76 dnl tl_CHECK_TOOLS(VARIABLE, PROGS-TO-CHECK-FOR [, VALUE-IF-NOT-FOUND
  77 dnl                [, PATH]])
  78 AC_DEFUN(tl_CHECK_TOOLS,
  79 [for ac_tool in $2
  80 do
  81 tl_CHECK_TOOL($1, [$]ac_tool, [$]ac_tool, , $4)
  82 test -n "[$]$1" && break
  83 done
  84 ifelse([$3], , , [test -n "[$]$1" || $1="$3"
  85 ])])
  86
  87 dnl replace AC_PROG_CC and AC_PROG_CXX
  88 undefine([AC_PROG_CC])
  89 define([AC_PROG_CC], [tl_PROG_CC])
  90 undefine([AC_PROG_CXX])
  91 define([AC_PROG_CXX], [tl_PROG_CXX])
  92
  93 dnl tl_PROG_CC, tl_PROG_CXX - same as old AC_PROG_CC and AC_PROG_CXX, but
  94 dnl use AC_CHECK_TOOL/tl_CHECK_TOOLS instead of AC_CHECK_PROG, etc.
  95 AC_DEFUN(tl_PROG_CC,
  96 [AC_BEFORE([$0], [AC_PROG_CPP])dnl
  97 AC_PROVIDE([AC_PROG_CC])dnl
  98 tl_CHECK_TOOL(CC, gcc, gcc)
  99 if test -z "$CC"; then
 100   AC_CHECK_TOOL(CC, cc, cc, , , /usr/ucb/cc)
 101   test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
 102 fi
 103 if test -n "$ac_tool_prefix" -a "`echo $CC | grep '$ac_tool_prefix'`" = "" \
 104         -a "`echo $CC | grep -- '-b'`" = ""; then
 105   if test -z "$ac_cv_prog_CC_dir" && $CC -v 2>&1 | grep -q gcc; then
 106     AC_CACHE_CHECK([if $CC -b${ac_tool_dir} works], tl_cv_prog_cc_bhost,[
 107     old_cc="${CC}"
 108     CC="${CC} -b${ac_tool_dir}"
 109     AC_LANG_SAVE
 110     AC_LANG_C
 111     AC_TRY_COMPILER([main(){return(0);}], tl_cv_prog_cc_bhost, ac_cv_prog_cc_cross)
 112     AC_LANG_RESTORE])
 113     if test $tl_cv_prog_cc_bhost = "yes"; then
 114       ac_cv_prog_cc_works=yes
 115       cctest=yes
 116     else
 117       CC="${old_cc}"
 118     fi
 119   fi
 120 fi
 121
 122 if test "$cctest" != "yes"; then
 123   tl_PROG_CC_WORKS
 124 fi
 125 AC_PROG_CC_GNU
 126
 127 if test $ac_cv_prog_gcc = yes; then
 128   GCC=yes
 129 dnl Check whether -g works, even if CFLAGS is set, in case the package
 130 dnl plays around with CFLAGS (such as to build both debugging and
 131 dnl normal versions of a library), tasteless as that idea is.
 132   ac_test_CFLAGS="${CFLAGS+set}"
 133   ac_save_CFLAGS="$CFLAGS"
 134   CFLAGS=
 135   AC_PROG_CC_G
 136   if test "$ac_test_CFLAGS" = set; then
 137     CFLAGS="$ac_save_CFLAGS"
 138   elif test $ac_cv_prog_cc_g = yes; then
 139     CFLAGS="-g -O2"
 140   else
 141     CFLAGS="-O2"
 142   fi
 143 else
 144   GCC=
 145   test "${CFLAGS+set}" = set || CFLAGS="-g"
 146 fi
 147 ])
 148
 149 AC_DEFUN(tl_PROG_CXX,
 150 [AC_BEFORE([$0], [AC_PROG_CXXCPP])dnl
 151 AC_PROVIDE([AC_PROG_CXX])dnl
 152 tl_CHECK_TOOLS(CXX, $CCC c++ g++ gcc CC cxx cc++, gcc)
 153 if test -n "$CXX"; then
 154   if test -n "$ac_tool_prefix" -a "`echo $CXX | grep '$ac_tool_prefix'`" = "" \
 155         -a "`echo $CXX | grep -- '-b'`" = ""; then
 156     if test -z "$ac_cv_prog_CXX_dir" && $CXX -v 2>&1 | grep -q gcc; then
 157       AC_CACHE_CHECK([if $CXX -b${ac_tool_dir} works], tl_cv_prog_cxx_bhost,[
 158       old_cxx="${CXX}"
 159       CXX="${CXX} -b${ac_tool_dir}"
 160       AC_LANG_SAVE
 161       AC_LANG_CPLUSPLUS
 162       AC_TRY_COMPILER([main(){return(0);}], tl_cv_prog_cxx_bhost, ac_cv_prog_cxx_cross)
 163       AC_LANG_RESTORE])
 164       if test $tl_cv_prog_cxx_bhost = "yes"; then
 165         ac_cv_prog_cxx_works=yes
 166         cxxtest=yes
 167       else
 168         CXX="${old_cxx}"
 169       fi
 170     fi
 171   fi
 172
 173   if test "$cxxtest" != "yes"; then
 174     tl_PROG_CXX_WORKS
 175   fi
 176   AC_PROG_CXX_GNU
 177
 178   if test $ac_cv_prog_gxx = yes; then
 179     GXX=yes
 180 dnl Check whether -g works, even if CXXFLAGS is set, in case the package
 181 dnl plays around with CXXFLAGS (such as to build both debugging and
 182 dnl normal versions of a library), tasteless as that idea is.
 183     ac_test_CXXFLAGS="${CXXFLAGS+set}"
 184     ac_save_CXXFLAGS="$CXXFLAGS"
 185     CXXFLAGS=
 186     AC_PROG_CXX_G
 187     if test "$ac_test_CXXFLAGS" = set; then
 188       CXXFLAGS="$ac_save_CXXFLAGS"
 189     elif test $ac_cv_prog_cxx_g = yes; then
 190       CXXFLAGS="-g -O2"
 191     else
 192       CXXFLAGS="-O2"
 193     fi
 194   else
 195     GXX=
 196     test "${CXXFLAGS+set}" = set || CXXFLAGS="-g"
 197   fi
 198 fi
 199 ])
 200
 201 AC_DEFUN(tl_PROG_CC_WORKS,
 202 [AC_PROVIDE(AC_PROG_CC_WORKS)
 203 AC_CACHE_CHECK([whether the C compiler ($CC $CFLAGS $LDFLAGS) works],
 204         ac_cv_prog_cc_works, [
 205 AC_LANG_SAVE
 206 AC_LANG_C
 207 AC_TRY_COMPILER([main(){return(0);}], ac_cv_prog_cc_works, ac_cv_prog_cc_cross)
 208 AC_LANG_RESTORE
 209 if test $ac_cv_prog_cc_works = no; then
 210   AC_MSG_ERROR([installation or configuration problem: C compiler cannot create executables.])
 211 fi])
 212 AC_MSG_CHECKING([whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler])
 213 AC_MSG_RESULT($ac_cv_prog_cc_cross)
 214 cross_compiling=$ac_cv_prog_cc_cross
 215 ])
 216
 217 AC_DEFUN(tl_PROG_CXX_WORKS,
 218 [AC_PROVIDE(AC_PROG_CXX_WORKS)
 219 AC_CACHE_CHECK([whether the C++ compiler ($CXX $CXXFLAGS $LDFLAGS) works],
 220         ac_cv_prog_cxx_works, [
 221 AC_LANG_SAVE
 222 AC_LANG_CPLUSPLUS
 223 AC_TRY_COMPILER([main(){return(0);}], ac_cv_prog_cxx_works, ac_cv_prog_cxx_cross)
 224 AC_LANG_RESTORE
 225 if test $ac_cv_prog_cxx_works = no; then
 226   AC_MSG_ERROR([installation or configuration problem: C++ compiler cannot create executables.])
 227 fi])
 228 AC_MSG_CHECKING([whether the C++ compiler ($CXX $CXXFLAGS $LDFLAGS) is a cross-compiler])
 229 AC_MSG_RESULT($ac_cv_prog_cxx_cross)
 230 cross_compiling=$ac_cv_prog_cxx_cross
 231 ])