1dnl Copyright 2010 Google Inc. 2dnl All rights reserved. 3dnl 4dnl Redistribution and use in source and binary forms, with or without 5dnl modification, are permitted provided that the following conditions are 6dnl met: 7dnl 8dnl * Redistributions of source code must retain the above copyright 9dnl notice, this list of conditions and the following disclaimer. 10dnl * Redistributions in binary form must reproduce the above copyright 11dnl notice, this list of conditions and the following disclaimer in the 12dnl documentation and/or other materials provided with the distribution. 13dnl * Neither the name of Google Inc. nor the names of its contributors 14dnl may be used to endorse or promote products derived from this software 15dnl without specific prior written permission. 16dnl 17dnl THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18dnl "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19dnl LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20dnl A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21dnl OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22dnl SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23dnl LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24dnl DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25dnl THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26dnl (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27dnl OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 29dnl \file developer-mode.m4 30dnl 31dnl "Developer mode" is a mode in which the build system reports any 32dnl build-time warnings as fatal errors. This helps in minimizing the 33dnl amount of trivial coding problems introduced in the code. 34dnl Unfortunately, this is not bullet-proof due to the wide variety of 35dnl compilers available and their different warning diagnostics. 36dnl 37dnl When developer mode support is added to a package, the compilation will 38dnl gain a bunch of extra warning diagnostics. These will NOT be enforced 39dnl unless developer mode is enabled. 40dnl 41dnl Developer mode is enabled when the user requests it through the 42dnl configure command line, or when building from the repository. The 43dnl latter is to minimize the risk of committing new code with warnings 44dnl into the tree. 45 46 47dnl Adds "developer mode" support to the package. 48dnl 49dnl This macro performs the actual definition of the --enable-developer 50dnl flag and implements all of its logic. See the file-level comment for 51dnl details as to what this implies. 52AC_DEFUN([KYUA_DEVELOPER_MODE], [ 53 m4_foreach([language], [$1], [m4_set_add([languages], language)]) 54 55 AC_ARG_ENABLE( 56 [developer], 57 AS_HELP_STRING([--enable-developer], [enable developer features]),, 58 [if test -d ${srcdir}/.git; then 59 AC_MSG_NOTICE([building from HEAD; developer mode autoenabled]) 60 enable_developer=yes 61 else 62 enable_developer=no 63 fi]) 64 65 # 66 # The following warning flags should also be enabled but cannot be. 67 # Reasons given below. 68 # 69 # -Wold-style-cast: Raises errors when using TIOCGWINSZ, at least under 70 # Mac OS X. This is due to the way _IOR is defined. 71 # 72 73 try_c_cxx_flags="-D_FORTIFY_SOURCE=2 \ 74 -Wall \ 75 -Wcast-qual \ 76 -Wextra \ 77 -Wpointer-arith \ 78 -Wredundant-decls \ 79 -Wreturn-type \ 80 -Wshadow \ 81 -Wsign-compare \ 82 -Wswitch \ 83 -Wwrite-strings" 84 85 try_c_flags="-Wmissing-prototypes \ 86 -Wno-traditional \ 87 -Wstrict-prototypes" 88 89 try_cxx_flags="-Wabi \ 90 -Wctor-dtor-privacy \ 91 -Wno-deprecated \ 92 -Wno-non-template-friend \ 93 -Wno-pmf-conversions \ 94 -Wnon-virtual-dtor \ 95 -Woverloaded-virtual \ 96 -Wreorder \ 97 -Wsign-promo \ 98 -Wsynth" 99 100 if test ${enable_developer} = yes; then 101 try_werror=yes 102 try_c_cxx_flags="${try_c_cxx_flags} -g -Werror" 103 else 104 try_werror=no 105 try_c_cxx_flags="${try_c_cxx_flags} -DNDEBUG" 106 fi 107 108 m4_set_contains([languages], [C], 109 [KYUA_CC_FLAGS(${try_c_cxx_flags} ${try_c_flags})]) 110 m4_set_contains([languages], [C++], 111 [KYUA_CXX_FLAGS(${try_c_cxx_flags} ${try_cxx_flags})]) 112]) 113