diff options
| -rw-r--r-- | CONTRIBUTORS.txt | 2 | ||||
| -rw-r--r-- | configure.ac | 38 |
2 files changed, 33 insertions, 7 deletions
diff --git a/CONTRIBUTORS.txt b/CONTRIBUTORS.txt index d2c3d18e..4aa1eea6 100644 --- a/CONTRIBUTORS.txt +++ b/CONTRIBUTORS.txt @@ -74,3 +74,5 @@ Patch contributors: * Added Swap(), SwapElements(), and RemoveLast() to Reflection interface. Alexander Melnikov <alm@sibmail.ru> * HPUX support. + Oliver Jowett <oliver.jowett@gmail.com> + * Detect whether zlib is new enough in configure script. diff --git a/configure.ac b/configure.ac index 754a190f..eb81a7eb 100644 --- a/configure.ac +++ b/configure.ac @@ -82,14 +82,38 @@ AC_FUNC_MEMCMP AC_FUNC_STRTOD AC_CHECK_FUNCS([ftruncate memset mkdir strchr strerror strtol]) +# Check for zlib. HAVE_ZLIB=0 -AS_IF([test "$with_zlib" != no], - [AC_SEARCH_LIBS([zlibVersion], [z], - [AC_DEFINE([HAVE_ZLIB], [1], [Enable classes using zlib compression.]) - HAVE_ZLIB=1], - [if test "$with_zlib" != check; then - AC_MSG_FAILURE([--with-zlib was given, but test for zlib failed]) - fi])]) +AS_IF([test "$with_zlib" != no], [ + AC_MSG_CHECKING([zlib version]) + + # First check the zlib header version. + AC_COMPILE_IFELSE( + AC_LANG_PROGRAM([[ + #include <zlib.h> + #if !defined(ZLIB_VERNUM) || (ZLIB_VERNUM < 0x1204) + # error zlib version too old + #endif + ]], []), [ + AC_MSG_RESULT([ok (1.2.0.4 or later)]) + + # Also need to add -lz to the linker flags and make sure this succeeds. + AC_SEARCH_LIBS([zlibVersion], [z], [ + AC_DEFINE([HAVE_ZLIB], [1], [Enable classes using zlib compression.]) + HAVE_ZLIB=1 + ], [ + AS_IF([test "$with_zlib" != check], [ + AC_MSG_FAILURE([--with-zlib was given, but no working zlib library was found]) + ]) + ]) + ], [ + AS_IF([test "$with_zlib" = check], [ + AC_MSG_RESULT([headers missing or too old (requires 1.2.0.4)]) + ], [ + AC_MSG_FAILURE([--with-zlib was given, but zlib headers were not present or were too old (requires 1.2.0.4)]) + ]) + ]) +]) AM_CONDITIONAL([HAVE_ZLIB], [test $HAVE_ZLIB = 1]) AS_IF([test "$with_protoc" != "no"], [ |