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      1 #---------------------------------------------------------------------------
      2 #
      3 # xc-val-flgs.m4
      4 #
      5 # Copyright (c) 2013 Daniel Stenberg <daniel (a] haxx.se>
      6 #
      7 # Permission to use, copy, modify, and distribute this software for any
      8 # purpose with or without fee is hereby granted, provided that the above
      9 # copyright notice and this permission notice appear in all copies.
     10 #
     11 # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
     12 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     13 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
     14 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     15 # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     16 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     17 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     18 #
     19 #---------------------------------------------------------------------------
     20 
     21 # serial 1
     22 
     23 
     24 dnl _XC_CHECK_VAR_LIBS
     25 dnl -------------------------------------------------
     26 dnl Private macro.
     27 
     28 AC_DEFUN([_XC_CHECK_VAR_LIBS], [
     29   xc_bad_var_libs=no
     30   for xc_word in $LIBS; do
     31     case "$xc_word" in
     32       -l* | --library=*)
     33         :
     34         ;;
     35       *)
     36         xc_bad_var_libs=yes
     37         ;;
     38     esac
     39   done
     40   if test $xc_bad_var_libs = yes; then
     41     AC_MSG_NOTICE([using LIBS: $LIBS])
     42     AC_MSG_NOTICE([LIBS note: LIBS should only be used to specify libraries (-lname).])
     43   fi
     44 ])
     45 
     46 
     47 dnl _XC_CHECK_VAR_LDFLAGS
     48 dnl -------------------------------------------------
     49 dnl Private macro.
     50 
     51 AC_DEFUN([_XC_CHECK_VAR_LDFLAGS], [
     52   xc_bad_var_ldflags=no
     53   for xc_word in $LDFLAGS; do
     54     case "$xc_word" in
     55       -D*)
     56         xc_bad_var_ldflags=yes
     57         ;;
     58       -U*)
     59         xc_bad_var_ldflags=yes
     60         ;;
     61       -I*)
     62         xc_bad_var_ldflags=yes
     63         ;;
     64       -l* | --library=*)
     65         xc_bad_var_ldflags=yes
     66         ;;
     67     esac
     68   done
     69   if test $xc_bad_var_ldflags = yes; then
     70     AC_MSG_NOTICE([using LDFLAGS: $LDFLAGS])
     71     xc_bad_var_msg="LDFLAGS note: LDFLAGS should only be used to specify linker flags, not"
     72     for xc_word in $LDFLAGS; do
     73       case "$xc_word" in
     74         -D*)
     75           AC_MSG_NOTICE([$xc_bad_var_msg macro definitions. Use CPPFLAGS for: $xc_word])
     76           ;;
     77         -U*)
     78           AC_MSG_NOTICE([$xc_bad_var_msg macro suppressions. Use CPPFLAGS for: $xc_word])
     79           ;;
     80         -I*)
     81           AC_MSG_NOTICE([$xc_bad_var_msg include directories. Use CPPFLAGS for: $xc_word])
     82           ;;
     83         -l* | --library=*)
     84           AC_MSG_NOTICE([$xc_bad_var_msg libraries. Use LIBS for: $xc_word])
     85           ;;
     86       esac
     87     done
     88   fi
     89 ])
     90 
     91 
     92 dnl _XC_CHECK_VAR_CPPFLAGS
     93 dnl -------------------------------------------------
     94 dnl Private macro.
     95 
     96 AC_DEFUN([_XC_CHECK_VAR_CPPFLAGS], [
     97   xc_bad_var_cppflags=no
     98   for xc_word in $CPPFLAGS; do
     99     case "$xc_word" in
    100       -rpath*)
    101         xc_bad_var_cppflags=yes
    102         ;;
    103       -L* | --library-path=*)
    104         xc_bad_var_cppflags=yes
    105         ;;
    106       -l* | --library=*)
    107         xc_bad_var_cppflags=yes
    108         ;;
    109     esac
    110   done
    111   if test $xc_bad_var_cppflags = yes; then
    112     AC_MSG_NOTICE([using CPPFLAGS: $CPPFLAGS])
    113     xc_bad_var_msg="CPPFLAGS note: CPPFLAGS should only be used to specify C preprocessor flags, not"
    114     for xc_word in $CPPFLAGS; do
    115       case "$xc_word" in
    116         -rpath*)
    117           AC_MSG_NOTICE([$xc_bad_var_msg library runtime directories. Use LDFLAGS for: $xc_word])
    118           ;;
    119         -L* | --library-path=*)
    120           AC_MSG_NOTICE([$xc_bad_var_msg library directories. Use LDFLAGS for: $xc_word])
    121           ;;
    122         -l* | --library=*)
    123           AC_MSG_NOTICE([$xc_bad_var_msg libraries. Use LIBS for: $xc_word])
    124           ;;
    125       esac
    126     done
    127   fi
    128 ])
    129 
    130 
    131 dnl _XC_CHECK_VAR_CFLAGS
    132 dnl -------------------------------------------------
    133 dnl Private macro.
    134 
    135 AC_DEFUN([_XC_CHECK_VAR_CFLAGS], [
    136   xc_bad_var_cflags=no
    137   for xc_word in $CFLAGS; do
    138     case "$xc_word" in
    139       -D*)
    140         xc_bad_var_cflags=yes
    141         ;;
    142       -U*)
    143         xc_bad_var_cflags=yes
    144         ;;
    145       -I*)
    146         xc_bad_var_cflags=yes
    147         ;;
    148       -rpath*)
    149         xc_bad_var_cflags=yes
    150         ;;
    151       -L* | --library-path=*)
    152         xc_bad_var_cflags=yes
    153         ;;
    154       -l* | --library=*)
    155         xc_bad_var_cflags=yes
    156         ;;
    157     esac
    158   done
    159   if test $xc_bad_var_cflags = yes; then
    160     AC_MSG_NOTICE([using CFLAGS: $CFLAGS])
    161     xc_bad_var_msg="CFLAGS note: CFLAGS should only be used to specify C compiler flags, not"
    162     for xc_word in $CFLAGS; do
    163       case "$xc_word" in
    164         -D*)
    165           AC_MSG_NOTICE([$xc_bad_var_msg macro definitions. Use CPPFLAGS for: $xc_word])
    166           ;;
    167         -U*)
    168           AC_MSG_NOTICE([$xc_bad_var_msg macro suppressions. Use CPPFLAGS for: $xc_word])
    169           ;;
    170         -I*)
    171           AC_MSG_NOTICE([$xc_bad_var_msg include directories. Use CPPFLAGS for: $xc_word])
    172           ;;
    173         -rpath*)
    174           AC_MSG_NOTICE([$xc_bad_var_msg library runtime directories. Use LDFLAGS for: $xc_word])
    175           ;;
    176         -L* | --library-path=*)
    177           AC_MSG_NOTICE([$xc_bad_var_msg library directories. Use LDFLAGS for: $xc_word])
    178           ;;
    179         -l* | --library=*)
    180           AC_MSG_NOTICE([$xc_bad_var_msg libraries. Use LIBS for: $xc_word])
    181           ;;
    182       esac
    183     done
    184   fi
    185 ])
    186 
    187 
    188 dnl XC_CHECK_USER_FLAGS
    189 dnl -------------------------------------------------
    190 dnl Public macro.
    191 dnl
    192 dnl Performs some sanity checks for LIBS, LDFLAGS,
    193 dnl CPPFLAGS and CFLAGS values that the user might
    194 dnl have set. When checks fails, user is noticed
    195 dnl about errors detected in all of them and script
    196 dnl execution is halted.
    197 dnl
    198 dnl Intended to be used early in configure script.
    199 
    200 AC_DEFUN([XC_CHECK_USER_FLAGS], [
    201   AC_PREREQ([2.50])dnl
    202   AC_BEFORE([$0],[XC_CHECK_PROG_CC])dnl
    203   dnl check order below matters
    204   _XC_CHECK_VAR_LIBS
    205   _XC_CHECK_VAR_LDFLAGS
    206   _XC_CHECK_VAR_CPPFLAGS
    207   _XC_CHECK_VAR_CFLAGS
    208   if test $xc_bad_var_libs = yes ||
    209      test $xc_bad_var_cflags = yes ||
    210      test $xc_bad_var_ldflags = yes ||
    211      test $xc_bad_var_cppflags = yes; then
    212      AC_MSG_ERROR([Can not continue. Fix errors mentioned immediately above this line.])
    213   fi
    214 ])
    215 
    216 
    217 dnl XC_CHECK_BUILD_FLAGS
    218 dnl -------------------------------------------------
    219 dnl Public macro.
    220 dnl
    221 dnl Performs some sanity checks for LIBS, LDFLAGS,
    222 dnl CPPFLAGS and CFLAGS values that the configure
    223 dnl script might have set. When checks fails, user
    224 dnl is noticed about errors detected in all of them
    225 dnl but script continues execution.
    226 dnl
    227 dnl Intended to be used very late in configure script.
    228 
    229 AC_DEFUN([XC_CHECK_BUILD_FLAGS], [
    230   AC_PREREQ([2.50])dnl
    231   dnl check order below matters
    232   _XC_CHECK_VAR_LIBS
    233   _XC_CHECK_VAR_LDFLAGS
    234   _XC_CHECK_VAR_CPPFLAGS
    235   _XC_CHECK_VAR_CFLAGS
    236   if test $xc_bad_var_libs = yes ||
    237      test $xc_bad_var_cflags = yes ||
    238      test $xc_bad_var_ldflags = yes ||
    239      test $xc_bad_var_cppflags = yes; then
    240      AC_MSG_WARN([Continuing even with errors mentioned immediately above this line.])
    241   fi
    242 ])
    243 
    244