From: Simon Glass <sjg@chromium.org> When the test is run, indicate which library the test was linked against, static or dynamic. Drop the printf() at the start of main(). Since all printf() calls go to U-Boot, this message is not shown anyway, since the global-data pointer gd is NULL at this point and console_puts() just returns immediately. Signed-off-by: Simon Glass <sjg@chromium.org> --- test/ulib/ulib_test.c | 39 ++++++++++++++++++++++++++++++++++++--- 1 file changed, 36 insertions(+), 3 deletions(-) diff --git a/test/ulib/ulib_test.c b/test/ulib/ulib_test.c index a68290ff484..51b1c62e6b2 100644 --- a/test/ulib/ulib_test.c +++ b/test/ulib/ulib_test.c @@ -2,7 +2,7 @@ /* * Test application for U-Boot shared library * - * This demonstrates linking against libu-boot.so + * This demonstrates linking against libu-boot.so and libu-boot.a * * Copyright 2025 Canonical * Written by Simon Glass <simon.glass@canonical.com> @@ -11,17 +11,50 @@ /* Use system headers, not U-Boot headers */ #include <stdio.h> #include <string.h> + +#include <os.h> #include <u-boot-lib.h> +/* Runtime detection of link type using /proc/self/maps */ +static const char *detect_link_type(void) +{ + char line[512]; + int fd; + int found_libuboot = 0; + + /* Open /proc/self/maps to check loaded libraries */ + fd = os_open("/proc/self/maps", 0); + if (fd < 0) + return "unable to detect linkage"; + + /* Read line by line to avoid boundary issues */ + while (os_fgets(line, sizeof(line), fd)) { + if (strstr(line, "libu-boot.so")) { + found_libuboot = 1; + break; + } + } + + os_close(fd); + + /* Return appropriate message based on what we found */ + if (found_libuboot) + return "dynamically linked (uses libu-boot.so)"; + else + return "statically linked (uses libu-boot.a)"; +} + int main(int argc, char *argv[]) { int ret; - printf("Calling U-Boot initialization via shared library...\n"); - ret = ulib_init(argv[0]); if (ret) return 1; + printf("Hello, world\n"); + printf("\n- U-Boot\n"); + printf("\nPS: This program is %s\n", detect_link_type()); + return ret; } -- 2.43.0