Autotools: Move PHP_ODBC_* defines to configuration header (#15708)

The PHP_ODBC_* defines are remains of the PHP 2 and 3 era where the ODBC
functionality was part of the PHP core and was later moved to an
extension. This moves these defines to a regular PHP configuration
header (php_config.h) as done in other extensions.

UPGRADING.INTERNALS

@@ -52,6 +52,9 @@ PHP 8.5 INTERNALS UPGRADE NOTES
 - Linux build system changes
   . libdir is properly set when --libdir (ex: /usr/lib64) and --with-libdir (ex lib64)
     configure options are used to ${libdir}/php (ex: /usr/lib64/php)
+  . PHP_ODBC_CFLAGS, PHP_ODBC_LFLAGS, PHP_ODBC_LIBS, PHP_ODBC_TYPE preprocessor
+    macros defined by ext/odbc are now defined in php_config.h instead of the
+    build-defs.h header.
 
 ========================
 3. Module changes

ext/odbc/config.m4

@@ -428,11 +428,16 @@ if test -n "$ODBC_TYPE"; then
 
   AC_DEFINE([HAVE_UODBC], [1],
     [Define to 1 if the PHP extension 'odbc' is available.])
+  AC_DEFINE_UNQUOTED([PHP_ODBC_CFLAGS], ["$ODBC_CFLAGS"],
+    [The compile options that PHP odbc extension was built with.])
+  AC_DEFINE_UNQUOTED([PHP_ODBC_LIBS], ["$ODBC_LIBS"],
+    [The libraries linker flags that PHP odbc extension was built with.])
+  AC_DEFINE_UNQUOTED([PHP_ODBC_LFLAGS], ["$ODBC_LFLAGS"],
+    [The linker flags that PHP odbc extension was built with.])
+  AC_DEFINE_UNQUOTED([PHP_ODBC_TYPE], ["$ODBC_TYPE"],
+    [The ODBC library used in the PHP odbc extension.])
+
   PHP_SUBST([ODBC_SHARED_LIBADD])
-  AC_SUBST([ODBC_CFLAGS])
-  AC_SUBST([ODBC_LIBS])
-  AC_SUBST([ODBC_LFLAGS])
-  AC_SUBST([ODBC_TYPE])
 
   PHP_NEW_EXTENSION([odbc],
     [php_odbc.c odbc_utils.c],

main/build-defs.h.in

@@ -15,10 +15,6 @@
 */
 
 #define CONFIGURE_COMMAND "@CONFIGURE_COMMAND@"
-#define PHP_ODBC_CFLAGS	"@ODBC_CFLAGS@"
-#define PHP_ODBC_LFLAGS		"@ODBC_LFLAGS@"
-#define PHP_ODBC_LIBS		"@ODBC_LIBS@"
-#define PHP_ODBC_TYPE		"@ODBC_TYPE@"
 #define PHP_PROG_SENDMAIL	"@PROG_SENDMAIL@"
 #define PEAR_INSTALLDIR         "@EXPANDED_PEAR_INSTALLDIR@"
 #define PHP_INCLUDE_PATH	"@INCLUDE_PATH@"