handle -L and -l somewhat intelligently

1 files changed, 39 insertions, 0 deletions

diff --git a/libs.c b/libs.c
new file mode 100644
index 0000000..e9ad7ae
--- /dev/null
+++ b/libs.c
@@ -0,0 +1,39 @@
+#define _XOPEN_SOURCE 700
+#include <errno.h>
+#include <libgen.h>
+#include <limits.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <unistd.h>
+
+#include "cc.h"
+#include "libs.h"
+
+static char **libdirs = NULL;
+static size_t nlibdirs = 0;
+
+void addlibdir(char *path, int commandline)
+{
+	libdirs = realloc(libdirs, (nlibdirs + 1) * sizeof(*libdirs));
+	if (!libdirs) {
+		error(NULL, commandline, "out of memory adding '%s' to library search path\n", path);
+	}
+	libdirs[nlibdirs++] = path;
+}
+
+char *findlib(const char *lib)
+{
+	char path[PATH_MAX];
+	for (size_t i = 0; i < nlibdirs; i++) {
+		snprintf(path, sizeof(path), "-l%s/lib%s.a", libdirs[i], lib);
+		printf("checking %s\n", path + 2);
+		if (access(path + 2, F_OK) == 0) {
+			printf("\tOK\n");
+			return strdup(path);
+		}
+	}
+	error(NULL, 1, "could not find library -l%s\n", lib);
+	return NULL;
+}