xref: /curl/m4/xc-val-flgs.m4 (revision 2bc1d775) 
1#---------------------------------------------------------------------------
2#
3# xc-val-flgs.m4
4#
5# Copyright (C), Daniel Stenberg <daniel@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# SPDX-License-Identifier: ISC
20#
21#---------------------------------------------------------------------------
22
23# serial 1
24
25
26dnl _XC_CHECK_VAR_LIBS
27dnl -------------------------------------------------
28dnl Private macro.
29
30AC_DEFUN([_XC_CHECK_VAR_LIBS], [
31  xc_bad_var_libs=no
32  for xc_word in $LIBS; do
33    case "$xc_word" in
34      -l* | --library=*)
35        :
36        ;;
37      *)
38        xc_bad_var_libs=yes
39        ;;
40    esac
41  done
42  if test $xc_bad_var_libs = yes; then
43    AC_MSG_NOTICE([using LIBS: $LIBS])
44    AC_MSG_NOTICE([LIBS note: LIBS should only be used to specify libraries (-lname).])
45  fi
46])
47
48
49dnl _XC_CHECK_VAR_LDFLAGS
50dnl -------------------------------------------------
51dnl Private macro.
52
53AC_DEFUN([_XC_CHECK_VAR_LDFLAGS], [
54  xc_bad_var_ldflags=no
55  for xc_word in $LDFLAGS; do
56    case "$xc_word" in
57      -D*)
58        xc_bad_var_ldflags=yes
59        ;;
60      -U*)
61        xc_bad_var_ldflags=yes
62        ;;
63      -I*)
64        xc_bad_var_ldflags=yes
65        ;;
66      -l* | --library=*)
67        xc_bad_var_ldflags=yes
68        ;;
69    esac
70  done
71  if test $xc_bad_var_ldflags = yes; then
72    AC_MSG_NOTICE([using LDFLAGS: $LDFLAGS])
73    xc_bad_var_msg="LDFLAGS note: LDFLAGS should only be used to specify linker flags, not"
74    for xc_word in $LDFLAGS; do
75      case "$xc_word" in
76        -D*)
77          AC_MSG_NOTICE([$xc_bad_var_msg macro definitions. Use CPPFLAGS for: $xc_word])
78          ;;
79        -U*)
80          AC_MSG_NOTICE([$xc_bad_var_msg macro suppressions. Use CPPFLAGS for: $xc_word])
81          ;;
82        -I*)
83          AC_MSG_NOTICE([$xc_bad_var_msg include directories. Use CPPFLAGS for: $xc_word])
84          ;;
85        -l* | --library=*)
86          AC_MSG_NOTICE([$xc_bad_var_msg libraries. Use LIBS for: $xc_word])
87          ;;
88      esac
89    done
90  fi
91])
92
93
94dnl _XC_CHECK_VAR_CPPFLAGS
95dnl -------------------------------------------------
96dnl Private macro.
97
98AC_DEFUN([_XC_CHECK_VAR_CPPFLAGS], [
99  xc_bad_var_cppflags=no
100  for xc_word in $CPPFLAGS; do
101    case "$xc_word" in
102      -rpath*)
103        xc_bad_var_cppflags=yes
104        ;;
105      -L* | --library-path=*)
106        xc_bad_var_cppflags=yes
107        ;;
108      -l* | --library=*)
109        xc_bad_var_cppflags=yes
110        ;;
111    esac
112  done
113  if test $xc_bad_var_cppflags = yes; then
114    AC_MSG_NOTICE([using CPPFLAGS: $CPPFLAGS])
115    xc_bad_var_msg="CPPFLAGS note: CPPFLAGS should only be used to specify C preprocessor flags, not"
116    for xc_word in $CPPFLAGS; do
117      case "$xc_word" in
118        -rpath*)
119          AC_MSG_NOTICE([$xc_bad_var_msg library runtime directories. Use LDFLAGS for: $xc_word])
120          ;;
121        -L* | --library-path=*)
122          AC_MSG_NOTICE([$xc_bad_var_msg library directories. Use LDFLAGS for: $xc_word])
123          ;;
124        -l* | --library=*)
125          AC_MSG_NOTICE([$xc_bad_var_msg libraries. Use LIBS for: $xc_word])
126          ;;
127      esac
128    done
129  fi
130])
131
132
133dnl _XC_CHECK_VAR_CFLAGS
134dnl -------------------------------------------------
135dnl Private macro.
136
137AC_DEFUN([_XC_CHECK_VAR_CFLAGS], [
138  xc_bad_var_cflags=no
139  for xc_word in $CFLAGS; do
140    case "$xc_word" in
141      -D*)
142        xc_bad_var_cflags=yes
143        ;;
144      -U*)
145        xc_bad_var_cflags=yes
146        ;;
147      -I*)
148        xc_bad_var_cflags=yes
149        ;;
150      -rpath*)
151        xc_bad_var_cflags=yes
152        ;;
153      -L* | --library-path=*)
154        xc_bad_var_cflags=yes
155        ;;
156      -l* | --library=*)
157        xc_bad_var_cflags=yes
158        ;;
159    esac
160  done
161  if test $xc_bad_var_cflags = yes; then
162    AC_MSG_NOTICE([using CFLAGS: $CFLAGS])
163    xc_bad_var_msg="CFLAGS note: CFLAGS should only be used to specify C compiler flags, not"
164    for xc_word in $CFLAGS; do
165      case "$xc_word" in
166        -D*)
167          AC_MSG_NOTICE([$xc_bad_var_msg macro definitions. Use CPPFLAGS for: $xc_word])
168          ;;
169        -U*)
170          AC_MSG_NOTICE([$xc_bad_var_msg macro suppressions. Use CPPFLAGS for: $xc_word])
171          ;;
172        -I*)
173          AC_MSG_NOTICE([$xc_bad_var_msg include directories. Use CPPFLAGS for: $xc_word])
174          ;;
175        -rpath*)
176          AC_MSG_NOTICE([$xc_bad_var_msg library runtime directories. Use LDFLAGS for: $xc_word])
177          ;;
178        -L* | --library-path=*)
179          AC_MSG_NOTICE([$xc_bad_var_msg library directories. Use LDFLAGS for: $xc_word])
180          ;;
181        -l* | --library=*)
182          AC_MSG_NOTICE([$xc_bad_var_msg libraries. Use LIBS for: $xc_word])
183          ;;
184      esac
185    done
186  fi
187])
188
189
190dnl XC_CHECK_USER_FLAGS
191dnl -------------------------------------------------
192dnl Public macro.
193dnl
194dnl Performs some sanity checks for LIBS, LDFLAGS,
195dnl CPPFLAGS and CFLAGS values that the user might
196dnl have set. When checks fails, user is noticed
197dnl about errors detected in all of them and script
198dnl execution is halted.
199dnl
200dnl Intended to be used early in configure script.
201
202AC_DEFUN([XC_CHECK_USER_FLAGS], [
203  AC_PREREQ([2.50])dnl
204  AC_BEFORE([$0],[XC_CHECK_PROG_CC])dnl
205  dnl check order below matters
206  _XC_CHECK_VAR_LIBS
207  _XC_CHECK_VAR_LDFLAGS
208  _XC_CHECK_VAR_CPPFLAGS
209  _XC_CHECK_VAR_CFLAGS
210  if test $xc_bad_var_libs = yes ||
211     test $xc_bad_var_cflags = yes ||
212     test $xc_bad_var_ldflags = yes ||
213     test $xc_bad_var_cppflags = yes; then
214     AC_MSG_ERROR([Can not continue. Fix errors mentioned immediately above this line.])
215  fi
216])
217
218
219dnl XC_CHECK_BUILD_FLAGS
220dnl -------------------------------------------------
221dnl Public macro.
222dnl
223dnl Performs some sanity checks for LIBS, LDFLAGS,
224dnl CPPFLAGS and CFLAGS values that the configure
225dnl script might have set. When checks fails, user
226dnl is noticed about errors detected in all of them
227dnl but script continues execution.
228dnl
229dnl Intended to be used very late in configure script.
230
231AC_DEFUN([XC_CHECK_BUILD_FLAGS], [
232  AC_PREREQ([2.50])dnl
233  dnl check order below matters
234  _XC_CHECK_VAR_LIBS
235  _XC_CHECK_VAR_LDFLAGS
236  _XC_CHECK_VAR_CPPFLAGS
237  _XC_CHECK_VAR_CFLAGS
238  if test $xc_bad_var_libs = yes ||
239     test $xc_bad_var_cflags = yes ||
240     test $xc_bad_var_ldflags = yes ||
241     test $xc_bad_var_cppflags = yes; then
242     AC_MSG_WARN([Continuing even with errors mentioned immediately above this line.])
243  fi
244])
245