Source of configure.ac - Zabbix

 
​
dnl *****************************************************************
dnl *                                                               *
dnl *                     Checks for programs                       *
dnl *                                                               *
dnl *****************************************************************
​
AC_PROG_CC([cc c99 gcc clang])
AM_PROG_CC_C_O
​
dnl A C99 compliant compiler must support this.
dnl
dnl The implementations differ across compilers and platforms.
dnl GCC allocates the storage blocks in bss during compilation,
dnl while others elect for the runtime loader to handle the allocation.
dnl
dnl This means the proper test would be to run the executable,
dnl but that would make no sense when cross-compiling,
dnl so the best we can do is just reject compilers that don't even
dnl recognize the keyword.
AC_MSG_CHECKING(whether compiler supports thread-local storage)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
    #include <stdio.h>
    ]], [[
    static __thread int a = 0;
    (void)a;
    ]])],
    [
        AC_MSG_RESULT(yes)
    ], [
        AC_MSG_RESULT(no)
        AC_MSG_ERROR([compiler does not recognize the __thread keyword])
    ]
)
​
dnl *****************************************************************
dnl *                                                               *
dnl *                   Checks for header files                     *
dnl *                                                               *
dnl *****************************************************************
​
AC_PROG_EGREP
​
AC_CHECK_HEADERS(stdio.h stdlib.h string.h unistd.h netdb.h signal.h malloc.h \
  syslog.h time.h errno.h sys/types.h sys/stat.h netinet/in.h \
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AC_MSG_RESULT(yes)],[AC_MSG_RESULT(no)])
​
AC_MSG_CHECKING(for linker options --start-group/--end-group)
saved_LDFLAGS="$LDFLAGS"
LDFLAGS="-Wl,--start-group -Wl,--end-group"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],[HAVE_START_GROUP="yes"
AC_MSG_RESULT(yes)],[AC_MSG_RESULT(no)
])
LDFLAGS="$saved_LDFLAGS"
​
AC_MSG_CHECKING(for '__thread' compiler support)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>]], [[static __thread int a = 0;]])],[AC_DEFINE(HAVE_THREAD_LOCAL,1,Define to 1 if compiler keyword '__thread' supported.)
AC_MSG_RESULT(yes)],[AC_MSG_RESULT(no)
HAVE_THREAD_LOCAL="no"])
​
AC_MSG_CHECKING(for field updates in struct vminfo_t)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/sysinfo.h>
]], [[
    vminfo_t vminfo;
    vminfo.updates;
]])],[AC_DEFINE(HAVE_VMINFO_T_UPDATES,1,Define to 1 if 'vminfo.updates' exists.)
AC_MSG_RESULT(yes)],[AC_MSG_RESULT(no)])
​
dnl *****************************************************************
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esac],
[agent=no])
AM_CONDITIONAL(AGENT, test "x$agent" = "xyes")
​
AC_ARG_ENABLE(agent2,[  --enable-agent2         Turn on build of Zabbix agent 2],
[case "${enableval}" in
  yes) agent2=yes ;;
  no)  agent2=no ;;
  *) AC_MSG_ERROR([bad value ${enableval} for --enable-agent2]) ;;
esac
test "x$agent2" = "xyes" -a "x$HAVE_THREAD_LOCAL" = "xno" && AC_MSG_ERROR([C compiler is not compatible with agent2 assembly])
],
[agent2=no])
AM_CONDITIONAL(AGENT2, test "x$agent2" = "xyes")
​
AC_ARG_ENABLE(webservice,[  --enable-webservice         Turn on build of Zabbix web service],
[case "${enableval}" in
  yes) webservice=yes ;;
  no)  webservice=no ;;
  *) AC_MSG_ERROR([bad value ${enableval} for --enable-webservice]) ;;
esac
test "x$webservice" = "xyes" -a "x$HAVE_THREAD_LOCAL" = "xno" && AC_MSG_ERROR([C compiler is not compatible with webservice assembly])
],
[webservice=no])
AM_CONDITIONAL(WEBSERVICE, test "x$webservice" = "xyes")
​
AC_ARG_ENABLE(java,[  --enable-java           Turn on build of Zabbix Java gateway],
[case "${enableval}" in
  yes) java=yes ;;
  no)  java=no ;;
  *) AC_MSG_ERROR([bad value ${enableval} for --enable-java]) ;;
esac],