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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2020-09-17 13:09:06 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2020-09-17 13:10:25 +0200
commitb52a9567520570bd6c850bcad3a6966f68639ef7 (patch)
treeb63e6515b25020b3abdfdd63731db0d44ac54925 /m4/zstd.m4
parentec38f4fa90d65362002a901b2d74be09fc6b128c (diff)
Add a check whether libzstd supports stream compression
Streaming compression was added fairly recently to zstd (and then the API was changed a few times). Rather than rely on libzstd versioning macros, this commit adds an m4 script to test at configure time if the enums/functions we need are available by trying to compile a small sample. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'm4/zstd.m4')
-rw-r--r--m4/zstd.m411
1 files changed, 11 insertions, 0 deletions
diff --git a/m4/zstd.m4 b/m4/zstd.m4
new file mode 100644
index 0000000..f644264
--- /dev/null
+++ b/m4/zstd.m4
@@ -0,0 +1,11 @@
+AC_DEFUN([AC_TEST_ZSTD_STREAM], [
+ AC_MSG_CHECKING([whether zstd supports stream compression])
+ AC_LANG_PUSH([C])
+ ac_zstd_save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS $ZSTD_CFLAGS"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <zstd.h>], [ZSTD_EndDirective op = ZSTD_e_end; ZSTD_compressStream2(NULL, NULL, NULL, op);])],
+ AC_DEFINE(HAVE_ZSTD_STREAM, 1, [Does zstd support stream compression?])
+ AC_MSG_RESULT([yes]), AC_MSG_RESULT([no]))
+ CFLAGS=$ac_zstd_save_CFLAGS
+ AC_LANG_POP([C])
+])