tinyproxy/configure.ac
rofl0r a547a298c7 generate manpages with pod2man instead of a2x/asciidoc(tor)
it turned out that the upstream section in tinyproxy.conf.5 wasn't rendered
properly, because in asciidoc items following a list item are always explicitly
appended to the last list item.
after several hours of finding a workaround, it was decided to change the
manpage generator to pod2man instead.

as pod2man ships together with any perl base install, it should be available
on almost every UNIX system, unlike asciidoc which requires installation
of a huge set of dependencies (more than 1.3 GB on Ubuntu 16.04), and the
replacement asciidoctor requires a ruby installation plus a "gem" (which is
by far better than asciidoc, but still more effort than using the already
available pod2man).

tinyproxy's hard requirement of a2x (asciidoctor) for building  from source
caused rivers of tears (and dozens of support emails/issues) in the past, but
finally we get rid of it. a tool such as a2x with its XML based bloat-
technology isn't really suited to go along with a supposedly lightweight
C program.

if it ever turns out that even pod2man is too heavy a dependency, we could
still write our own replacement in less than 50 lines of awk, as the pod
syntax is very low level and easy to parse.
2020-08-19 22:45:37 +01:00

234 lines
7.2 KiB
Plaintext

# Process this file with autoconf to produce a configure script.
# Portions of this file were adapted from GIMP.
AC_PREREQ(2.54)
m4_define([tinyproxy_version], esyscmd(sh scripts/version.sh | tr -d '\n'))
AC_INIT([Tinyproxy], [tinyproxy_version],
[https://tinyproxy.github.io/],
[tinyproxy])
AC_CANONICAL_TARGET
AM_INIT_AUTOMAKE([dist-bzip2 dist-xz])
AC_CONFIG_HEADERS(config.h)
AC_CONFIG_MACRO_DIR([m4macros])
m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])])
dnl Temporarily defined here until we get tinyproxy-version.h
AC_DEFINE(TINYPROXY_VERSION, "tinyproxy_version", [Tinyproxy version number])
dnl Check if we're compiling on a weird platform :)
AC_USE_SYSTEM_EXTENSIONS
dnl Set the domain name for find the statistics of tinyproxy
AH_TEMPLATE([TINYPROXY_STATHOST],
[This controls remote proxy stats display.])
AC_ARG_WITH(stathost,
[AC_HELP_STRING([--with-stathost=HOST], [Default status host])],
[AC_DEFINE_UNQUOTED(TINYPROXY_STATHOST, "$withval")
TINYPROXY_STATHOST="$withval"],
[AC_DEFINE_UNQUOTED(TINYPROXY_STATHOST, "tinyproxy.stats")
TINYPROXY_STATHOST="tinyproxy.stats"])
AC_SUBST(TINYPROXY_STATHOST)
dnl Add compiler-specific optimization flags
TP_ARG_ENABLE(debug,
[Enable debugging support code and methods (default is NO)],
no)
dnl Check to see if the XTinyproxy header is to be included
AH_TEMPLATE([XTINYPROXY_ENABLE],
[Define if you want to have the peer's IP address included in a XTinyproxy header sent to the server.])
TP_ARG_ENABLE(xtinyproxy,
[Include the X-Tinyproxy header (default is YES)],
yes)
if test x"$xtinyproxy_enabled" = x"yes"; then
AC_DEFINE(XTINYPROXY_ENABLE)
fi
dnl Include filtering for domain/URLs
AH_TEMPLATE([FILTER_ENABLE],
[Defined if you would like filtering code included.])
TP_ARG_ENABLE(filter,
[Enable filtering of domains/URLS (default is YES)],
yes)
if test x"$filter_enabled" = x"yes"; then
ADDITIONAL_OBJECTS="$ADDITIONAL_OBJECTS filter.o"
AC_DEFINE(FILTER_ENABLE)
fi
dnl Include support for upstream proxies?
AH_TEMPLATE([UPSTREAM_SUPPORT],
[Include support for connecting to an upstream proxy.])
TP_ARG_ENABLE(upstream,
[Enable upstream proxying (default is YES)],
yes)
if test x"$upstream_enabled" = x"yes"; then
AC_DEFINE(UPSTREAM_SUPPORT)
fi
dnl Include support for reverse proxy?
AH_TEMPLATE([REVERSE_SUPPORT],
[Include support for reverse proxy.])
TP_ARG_ENABLE(reverse,
[Enable reverse proxying (default is YES)],
yes)
if test x"$reverse_enabled" = x"yes"; then
ADDITIONAL_OBJECTS="$ADDITIONAL_OBJECTS reverse-proxy.o"
AC_DEFINE(REVERSE_SUPPORT)
fi
dnl Include the transparent proxy support
AH_TEMPLATE([TRANSPARENT_PROXY],
[Include support for using tinyproxy as a transparent proxy.])
TP_ARG_ENABLE(transparent,
[Enable transparent proxying code (default is YES)],
yes)
if test x"$transparent_enabled" = x"yes"; then
ADDITIONAL_OBJECTS="$ADDITIONAL_OBJECTS transparent-proxy.o"
AC_DEFINE(TRANSPARENT_PROXY)
fi
dnl Let user decide whether he wants support for manpages
dnl Which require either pod2man or a tarball release
AH_TEMPLATE([MANPAGE_SUPPORT],
[Build manpages with pod2man if they are missing from the distribution.])
TP_ARG_ENABLE(manpage_support,
[Enable support for building manpages (default is YES)],
yes)
AM_CONDITIONAL(HAVE_MANPAGE_INTEREST, test x"$manpage_support_enabled" = x"yes")
# This is required to build test programs below
AC_PROG_CC
dnl
dnl Checks for libraries
dnl
AC_CHECK_LIB(socket, socket, , [AC_CHECK_LIB(socket, htonl)])
dnl Some systems (OpenServer 5) dislike -lsocket -lnsl, so we try to
dnl avoid -lnsl checks, if we already have the functions which are
dnl usually in libnsl
unset ac_cv_func_yp_get_default_domain
AC_CHECK_FUNC(yp_get_default_domain,
tinyproxy_no_nsl_checks=yes,
tinyproxy_no_nsl_checks=no)
unset ac_cv_func_yp_get_default_domain
if test x"$tinyproxy_no_nsl_checks" != x"yes"; then
AC_CHECK_LIB(nsl, gethostname, , [AC_CHECK_LIB(nsl, gethostbyaddr)])
fi
AC_CHECK_LIB(resolv, inet_aton)
dnl
dnl Checks for headers
dnl
AC_HEADER_STDC
AC_HEADER_TIME
AC_HEADER_SYS_WAIT
AC_CHECK_HEADERS([sys/ioctl.h alloca.h memory.h malloc.h sysexits.h \
values.h])
dnl Checks for libary functions
AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK
AC_FUNC_MALLOC
AC_FUNC_REALLOC
AC_CHECK_FUNCS([inet_ntoa strdup])
AC_CHECK_FUNCS([strlcpy strlcat setgroups])
dnl Enable extra warnings
DESIRED_FLAGS="-fdiagnostics-show-option -Wall -Wextra -Wno-unused-parameter -Wmissing-prototypes -Wstrict-prototypes -Wmissing-declarations -Wfloat-equal -Wundef -Wformat=2 -Wlogical-op -Wmissing-include-dirs -Wformat-nonliteral -Wold-style-definition -Wpointer-arith -Waggregate-return -Winit-self -Wpacked --std=c89 -ansi -Wno-overlength-strings -Wno-long-long -Wno-overlength-strings -Wdeclaration-after-statement -Wredundant-decls -Wmissing-noreturn -Wshadow -Wendif-labels -Wcast-qual -Wcast-align -Wwrite-strings -Wp,-D_FORTIFY_SOURCE=2 -fno-common"
if test -n "${MAINTAINER_MODE_FALSE}"; then
DESIRED_FLAGS="-Werror $DESIRED_FLAGS"
fi
for flag in $DESIRED_FLAGS; do
AS_COMPILER_FLAG([$flag], [CFLAGS="$CFLAGS $flag"])
done
dnl Disable debugging if it's not specified
if test x"$debug_enabled" != x"yes" ; then
CFLAGS="-DNDEBUG $CFLAGS"
fi
AS_ECHO_N(["checking to see if linker understands -z,defs... "])
LDFLAGS_OLD="-Wl $LDFLAGS"
LDFLAGS="-Wl,-z,defs $LDFLAGS"
AC_LINK_IFELSE([AC_LANG_PROGRAM()],
AS_ECHO("yes"),
AS_ECHO("no"); LDFLAGS="$LDFLAGS_OLD")
dnl
dnl Make sure we can actually handle the "--with-*" and "--enable-*" stuff.
dnl
dnl
dnl Substitute the variables into the various Makefiles
dnl
AC_SUBST(CFLAGS)
AC_SUBST(LDFLAGS)
AC_SUBST(CPPFLAGS)
AC_SUBST(LIBS)
AC_SUBST(ADDITIONAL_OBJECTS)
if test x"$manpage_support_enabled" = x"yes"; then
AC_PATH_PROG(POD2MAN, pod2man, no)
if test "x$POD2MAN" = "xno" && \
! test -e docs/man5/tinyproxy.conf.5 -a -e docs/man8/tinyproxy.8 ; then
AC_MSG_ERROR([
manpage generation requested, but neither pod2man
nor pre-generated manpages found.
Use --disable-manpage-support if you want to compile anyway.])
fi
fi #manpage_support_enabled
AM_CONDITIONAL(HAVE_POD2MAN, test "x$POD2MAN" != "x" -a "x$POD2MAN" != "xno")
AC_CONFIG_FILES([
Makefile
src/Makefile
data/Makefile
data/templates/Makefile
etc/Makefile
docs/Makefile
docs/man5/Makefile
docs/man5/tinyproxy.conf.txt
docs/man8/Makefile
docs/man8/tinyproxy.txt
m4macros/Makefile
tests/Makefile
tests/scripts/Makefile
scripts/Makefile
])
AC_OUTPUT
# the manpages are shipped in the release tarball and we don't want them to
# get regenerated if pod2man is not available. the intermediate files from
# AC_CONFIG_FILES are created with config.status, which is created at configure
# runtime, so we need to touch them after config.status terminated to prevent
# make from rebuild them.
if test "x$POD2MAN" = "xno" ; then
touch docs/man5/tinyproxy.conf.txt
touch docs/man8/tinyproxy.txt
if test -e docs/man5/tinyproxy.conf.5 ; then
touch docs/man5/tinyproxy.conf.5
fi
if test -e docs/man8/tinyproxy.8 ; then
touch docs/man8/tinyproxy.8
fi
fi