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Autotools: Add pkg-config support for NET-SNMP library (#15261)

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NET-SNMP has pkg-config support since 5.8.1

This optionally finds the NET-SNMP library using pkg-config or falls
back to find library on the system with net-snmp-config. The configure
option argument (--with-snmp=DIR) works like before (path to the
net-snmp-config).

When explicitly using the DIR argument, the pkg-config check is silently
skipped.

When not using DIR argument, the SNMP_CFLAGS and SNMP_LIBS can be also
used to find the NET-SNMP library:

    ./configure --with-snmp \
        SNMP_CFLAGS=-I/path/to/net-snmp/include \
        SNMP_LIBS="-L/path/to/net-snmp -lnetsnmp"

Co-authored-by: Calvin Buckley <calvin@cmpct.info>
This commit is contained in:
Peter Kokot 2024-08-09 18:08:32 +02:00 committed by GitHub
parent 8044db121f
commit 3a30c29d73
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GPG Key ID: B5690EEEBB952194
2 changed files with 40 additions and 30 deletions
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2
UPGRADING.INTERNALS
View File

@ -192,6 +192,8 @@ PHP 8.4 INTERNALS UPGRADE NOTES
- Added pkg-config support to find GNU MP library. As a fallback default
system paths are searched. When a directory argument is provided
(--with-gmp=DIR), it will be used instead of the pkg-config.
- Added optional pkg-config support to find NET-SNMP library. As a fallback
net-snmp-config utility is used like before.
- Removed BC enable_pear variable check due to --enable-pear configure option
once used (use with_pear variable name).
- Cache variables synced to php_cv_* naming scheme. If you use them for

68
ext/snmp/config.m4
View File

@ -1,40 +1,48 @@
PHP_ARG_WITH([snmp],
[for SNMP support],
[AS_HELP_STRING([[--with-snmp[=DIR]]],
[Include SNMP support])])
[Include SNMP support. Use PKG_CONFIG_PATH (or SNMP_CFLAGS and SNMP_LIBS)
environment variables, or alternatively the optional DIR argument to
customize where to look for the net-snmp-config utility of the NET-SNMP
library.])])
if test "$PHP_SNMP" != "no"; then
snmp_found=no
AS_VAR_IF([PHP_SNMP], [yes],
[PKG_CHECK_MODULES([SNMP], [netsnmp >= 5.3], [snmp_found=yes], [:])])
if test "$PHP_SNMP" = "yes"; then
AC_PATH_PROG(SNMP_CONFIG,net-snmp-config,,[/usr/local/bin:$PATH])
else
SNMP_CONFIG="$PHP_SNMP/bin/net-snmp-config"
fi
AS_VAR_IF([snmp_found], [no], [
AS_VAR_IF([PHP_SNMP], [yes],
[AC_PATH_PROG([SNMP_CONFIG], [net-snmp-config],, [/usr/local/bin:$PATH])],
[SNMP_CONFIG="$PHP_SNMP/bin/net-snmp-config"])
if test -x "$SNMP_CONFIG"; then
SNMP_LIBS=`$SNMP_CONFIG --netsnmp-libs`
SNMP_LIBS="$SNMP_LIBS `$SNMP_CONFIG --external-libs`"
SNMP_PREFIX=`$SNMP_CONFIG --prefix`
snmp_full_version=`$SNMP_CONFIG --version`
ac_IFS=$IFS
IFS="."
set $snmp_full_version
IFS=$ac_IFS
SNMP_VERSION=`expr [$]1 \* 1000 + [$]2`
if test "$SNMP_VERSION" -ge "5003"; then
if test -n "$SNMP_LIBS" && test -n "$SNMP_PREFIX"; then
PHP_ADD_INCLUDE([${SNMP_PREFIX}/include])
PHP_EVAL_LIBLINE([$SNMP_LIBS], [SNMP_SHARED_LIBADD])
SNMP_LIBNAME=netsnmp
else
AC_MSG_ERROR([Could not find the required paths. Please check your net-snmp installation.])
fi
else
AC_MSG_ERROR([Net-SNMP version 5.3 or greater required (detected $snmp_full_version).])
fi
else
AC_MSG_ERROR([Could not find net-snmp-config binary. Please check your net-snmp installation.])
fi
AS_IF([test ! -x "$SNMP_CONFIG"],
[AC_MSG_ERROR(m4_text_wrap([
Could not find net-snmp-config binary. Please check your net-snmp
installation.
]))])
snmp_version=$($SNMP_CONFIG --version)
AS_VERSION_COMPARE([$snmp_version], [5.3],
[AC_MSG_ERROR(m4_text_wrap([
Net-SNMP version 5.3 or greater required (detected $snmp_version).
]))])
SNMP_PREFIX=$($SNMP_CONFIG --prefix)
SNMP_CFLAGS="-I${SNMP_PREFIX}/include"
SNMP_LIBS=$($SNMP_CONFIG --netsnmp-libs)
SNMP_LIBS="$SNMP_LIBS $($SNMP_CONFIG --external-libs)"
AS_IF([test -z "$SNMP_LIBS" || test -z "$SNMP_PREFIX"],
[AC_MSG_ERROR(m4_text_wrap([
Could not find the required paths. Please check your net-snmp
installation.
]))])
])
PHP_EVAL_INCLINE([$SNMP_CFLAGS])
PHP_EVAL_LIBLINE([$SNMP_LIBS], [SNMP_SHARED_LIBADD])
SNMP_LIBNAME=netsnmp
dnl Test build.
PHP_CHECK_LIBRARY([$SNMP_LIBNAME], [init_snmp],