configure: Get version string from git or from VERSION file (#1380)

Use git to create the version string if possible. Otherwise get the version from the VERSION file. Signed-off-by: Stefan Weil <sw@weilnetz.de>
tesseract-ocr · Mar 12, 2018 · 8fb6874 · 8fb6874
1 parent 2d319cb
commit 8fb6874
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diff --git a/VERSION b/VERSION
@@ -0,0 +1 @@
+4.0.0-beta.1
diff --git a/configure.ac b/configure.ac
@@ -7,7 +7,7 @@
 # ----------------------------------------
 AC_PREREQ([2.59])
 AC_INIT([tesseract],
-        [4.0.0-beta.1],
+        [m4_esyscmd([echo -n $(test -d .git && git describe --abbrev=4 || cat VERSION)])],
         [https://github.com/tesseract-ocr/tesseract/issues],,
         [https://github.com/tesseract-ocr/tesseract/])
 AC_PROG_CXX([g++ clang++])