Blame SOURCES/httpd-2.4.35-detect-systemd.patch

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diff --git a/Makefile.in b/Makefile.in
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index ea8366e..06b8c5a 100644
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--- a/Makefile.in
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+++ b/Makefile.in
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@@ -4,7 +4,7 @@ CLEAN_SUBDIRS = test
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 PROGRAM_NAME         = $(progname)
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 PROGRAM_SOURCES      = modules.c
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-PROGRAM_LDADD        = buildmark.o $(HTTPD_LDFLAGS) $(PROGRAM_DEPENDENCIES) $(PCRE_LIBS) $(EXTRA_LIBS) $(AP_LIBS) $(LIBS)
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+PROGRAM_LDADD        = buildmark.o $(HTTPD_LDFLAGS) $(PROGRAM_DEPENDENCIES) $(HTTPD_LIBS) $(EXTRA_LIBS) $(AP_LIBS) $(LIBS)
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 PROGRAM_PRELINK      = $(COMPILE) -c $(top_srcdir)/server/buildmark.c
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 PROGRAM_DEPENDENCIES = \
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   server/libmain.la \
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diff --git a/acinclude.m4 b/acinclude.m4
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index ce1d637..0ad0c13 100644
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--- a/acinclude.m4
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+++ b/acinclude.m4
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@@ -606,6 +606,30 @@ AC_DEFUN([APACHE_CHECK_OPENSSL],[
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   fi
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 ])
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+AC_DEFUN(APACHE_CHECK_SYSTEMD, [                                                                        
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+dnl Check for systemd support for listen.c's socket activation.
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+case $host in
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+*-linux-*)
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+   if test -n "$PKGCONFIG" && $PKGCONFIG --exists libsystemd; then
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+      SYSTEMD_LIBS=`$PKGCONFIG --libs libsystemd`
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+   elif test -n "$PKGCONFIG" && $PKGCONFIG --exists libsystemd-daemon; then
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+      SYSTEMD_LIBS=`$PKGCONFIG --libs libsystemd-daemon`
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+   else
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+      AC_CHECK_LIB(systemd-daemon, sd_notify, SYSTEMD_LIBS="-lsystemd-daemon")
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+   fi
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+   if test -n "$SYSTEMD_LIBS"; then
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+      AC_CHECK_HEADERS(systemd/sd-daemon.h)
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+      if test "${ac_cv_header_systemd_sd_daemon_h}" = "no" || test -z "${SYSTEMD_LIBS}"; then
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+        AC_MSG_WARN([Your system does not support systemd.])
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+      else
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+        APR_ADDTO(HTTPD_LIBS, [$SYSTEMD_LIBS])
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+        AC_DEFINE(HAVE_SYSTEMD, 1, [Define if systemd is supported])
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+      fi
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+   fi
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+   ;;
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+esac
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+])
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+
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 dnl
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 dnl APACHE_EXPORT_ARGUMENTS
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 dnl Export (via APACHE_SUBST) the various path-related variables that
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diff --git a/configure.in b/configure.in
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index 82bfeef..eedba50 100644
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--- a/configure.in
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+++ b/configure.in
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@@ -234,6 +234,7 @@ if test "$PCRE_CONFIG" != "false"; then
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   AC_MSG_NOTICE([Using external PCRE library from $PCRE_CONFIG])
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   APR_ADDTO(PCRE_INCLUDES, [`$PCRE_CONFIG --cflags`])
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   APR_ADDTO(PCRE_LIBS, [`$PCRE_CONFIG --libs`])
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+  APR_ADDTO(HTTPD_LIBS, [\$(PCRE_LIBS)])
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 else
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   AC_MSG_ERROR([pcre-config for libpcre not found. PCRE is required and available from http://pcre.org/])
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 fi
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@@ -504,6 +505,8 @@ if test "$ac_cv_struct_tm_gmtoff" = "yes"; then
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     AC_DEFINE(HAVE_GMTOFF, 1, [Define if struct tm has a tm_gmtoff field])
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 fi
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+APACHE_CHECK_SYSTEMD
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+
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 dnl ## Set up any appropriate OS-specific environment variables for apachectl
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 case $host in
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@@ -677,6 +680,7 @@ APACHE_SUBST(OS_DIR)
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 APACHE_SUBST(BUILTIN_LIBS)
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 APACHE_SUBST(SHLIBPATH_VAR)
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 APACHE_SUBST(OS_SPECIFIC_VARS)
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+APACHE_SUBST(HTTPD_LIBS)
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 PRE_SHARED_CMDS='echo ""'
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 POST_SHARED_CMDS='echo ""'