pdfgep: call setlocale only on glibc systems. Fixes #7988.

srcpkgs/pdfgrep/patches/fix-musl.patch

@@ -0,0 +1,14 @@
+diff --git a/src/pdfgrep.cc b/src/pdfgrep.cc
+index 7f8bdf8..5283e16 100644
+--- ./src/pdfgrep.cc
++++ ./src/pdfgrep.cc
+@@ -460,7 +460,9 @@ int main(int argc, char** argv)
+        // Set locale to user-preference. If this locale is an UTF-8 locale, the
+        // regex-functions regcomp/regexec become unicode aware, which means
+        // e.g. that '.' will match a unicode character, not a single byte.
++#ifdef __GLIBC__
+        locale::global(locale(""));
++#endif
+ 
+        enum re_engine_type {
+                RE_POSIX = 0,

srcpkgs/pdfgrep/template

@@ -1,7 +1,7 @@
 # Template file for 'pdfgrep'
 pkgname=pdfgrep
 version=2.1.2
-revision=1
+revision=2
 build_style=gnu-configure
 hostmakedepends="pkg-config"
 makedepends="libgcrypt-devel poppler-cpp-devel"