pdfgrep: Update to 2.1.2 and fix build on <= 10.7

textproc/pdfgrep/Portfile

@@ -1,8 +1,12 @@
 PortSystem          1.0
 
 name                pdfgrep
-version             2.1.1
-revision            1
+version             2.1.2
+revision            0
+checksums           rmd160  59fe7845f96c988a3f96cf324a0bb72fcc6d8b97 \
+                    sha256  0ef3dca1d749323f08112ffe68e6f4eb7bc25f56f90a2e933db477261b082aba \
+                    size    197289
+
 conflicts           pdfgrep-legacy
 categories          textproc
 platforms           darwin
@@ -12,12 +16,8 @@ description         A tool to search text in PDF files.
 long_description \
    Pdfgrep is a tool to search text in PDF files. It works similar to grep.
 
-homepage            https://pdfgrep.org/
-master_sites        https://pdfgrep.org/download/
-
-checksums           rmd160  ef5df881b370e0342f33f9775cb156adb796027d \
-                    sha256  2c8155f30fe5d9d8ec4340e48133ed0b241496bbebe29498931f975c67a10c0b \
-                    size    196526
+homepage            https://pdfgrep.org
+master_sites        ${homepage}/download/
 
 compiler.cxx_standard 2011
 
@@ -26,6 +26,8 @@ depends_lib         port:poppler \
                     port:pcre \
                     port:libgcrypt
 
+patchfiles          scandir.patch
+
 configure.args      --without-unac
 
 variant unac description {Use unac to remove accents and ligatures before searching} {

textproc/pdfgrep/files/scandir.patch

@@ -0,0 +1,50 @@
+The prototype of scandir changed in the 10.8 SDK. Use the old prototype on old SDKs.
+https://gitlab.com/pdfgrep/pdfgrep/-/merge_requests/14
+--- src/cache.cc.orig	2018-11-19 05:44:28.000000000 -0600
++++ src/cache.cc	2021-12-02 18:31:06.000000000 -0600
+@@ -35,6 +35,15 @@
+ #include <errno.h>
+ #include <string.h>
+
++#ifdef __APPLE__
++#include <AvailabilityMacros.h>
++#endif
++
++#define HAVE_NEW_SCANDIR
++#if (defined(MAC_OS_X_VERSION_MAX_ALLOWED) && MAC_OS_X_VERSION_MAX_ALLOWED < 1080)
++#undef HAVE_NEW_SCANDIR
++#endif
++
+ using namespace std;
+
+ Cache::Cache(string cache_file)
+@@ -86,9 +95,13 @@
+
+ // I feel so bad...
+ static const char *cache_directory;
+-static int agesort(const struct dirent ** a, const struct dirent **b) {
+-	std::string A = string(cache_directory) + "/" + (*a)->d_name;
+-	std::string B = string(cache_directory) + "/" + (*b)->d_name;
++#ifdef HAVE_NEW_SCANDIR
++static int agesort(const struct dirent **a, const struct dirent **b) {
++#else
++static int agesort(const void *a, const void *b) {
++#endif
++	std::string A = string(cache_directory) + "/" + (*(const struct dirent **)a)->d_name;
++	std::string B = string(cache_directory) + "/" + (*(const struct dirent **)b)->d_name;
+
+ 	struct stat bufa, bufb;
+ 	if (stat(A.c_str(), &bufa) != 0) return 0;
+@@ -97,7 +110,11 @@
+ 	return bufb.st_mtime - bufa.st_mtime;
+ }
+
+-static int agefilter(const struct dirent * a) {
++#ifdef HAVE_NEW_SCANDIR
++static int agefilter(const struct dirent *a) {
++#else
++static int agefilter(struct dirent *a) {
++#endif
+ 	if (a->d_name[0] == '.') return false;
+ 	std::string A = string(cache_directory) + "/" + a->d_name;
+ 	struct stat bufa;