sparse file detection test

math/pari/Portfile

@@ -26,10 +26,23 @@ checksums           rmd160  3381ba95fdc5b807b82516253dca029a4cf9c45f \
 
 # System's tar on at least macOS Ventura is broken
 # See: https://trac.macports.org/ticket/67336
-pre-install {
-    if {[getuid] == 0 && [file exists /usr/sbin/purge]} {
-        system "/usr/sbin/purge"
-    }
+#pre-install {
+#    if {[getuid] == 0 && [file exists /usr/sbin/purge]} {
+#        system "/usr/sbin/purge"
+#    }
+#}
+
+pre-build {
+    system -W $workpath "${configure.cc} ${configure.optflags} -o findholes ${filespath}/findholes.c"
+}
+
+post-destroot {
+    system -W $workpath "./findholes ${destroot}${prefix}/lib/libpari-gmp.dylib"
+    ui_msg "destroot libpari-gmp.dylib is binary? [fileIsBinary ${destroot}${prefix}/lib/libpari-gmp.dylib]"
+}
+
+post-activate {
+    ui_msg "activated libpari-gmp.dylib is binary? [fileIsBinary ${prefix}/lib/libpari-gmp.dylib]"
 }
 
 depends_lib         port:gmp \

math/pari/files/findholes.c

@@ -0,0 +1,28 @@
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int main(int argc, char *argv[])
+{
+    off_t seekpos = 0;
+
+    if (argc < 2) {
+        printf("usage: %s file\n", argv[0]);
+        return 1;
+    }
+
+    int fd = open(argv[1], O_RDONLY);
+    if (fd < 0) {
+        perror("open");
+        return 1;
+    }
+
+    seekpos = lseek(fd, 0, SEEK_SET);
+    seekpos = lseek(fd, 0, SEEK_HOLE);
+    printf("SEEK_HOLE: seekpos = %lld\n", seekpos);
+    seekpos = lseek(fd, 0, SEEK_DATA);
+    printf("SEEK_DATA: seekpos = %lld\n", seekpos);
+
+    close(fd);
+    return 0;
+}