Implement Alpine Linux support with Dockerfile to boot

Dockerfile

@@ -0,0 +1,9 @@
+FROM alpine
+RUN apk add --no-cache bison cmake pkgconf python3 \
+    openssl-dev bzip2-dev lz4-dev pcre-dev readline-dev xz-dev zlib-dev \
+    build-base
+WORKDIR /src/monetdb
+COPY . .
+RUN cmake -S . -B build && \
+    cmake --build build && \
+    cmake --install build --prefix /mybin

common/stream/stream.c

@@ -434,7 +434,10 @@ my_strerror_r(int error_nr, char *buf, size_t buflen)
 #ifndef HAVE_STRERROR_R
 	// Hope for the best
 	to_move = strerror(error_nr);
-#elif !defined(_GNU_SOURCE) || !_GNU_SOURCE
+
+#elif (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L \
+       || defined(_XOPEN_SOURCE) && _XOPEN_SOURCE >= 600) && \
+       !_GNU_SOURCE || defined(__MUSL__)
 	// standard strerror_r always writes to buf
 	int result_code = strerror_r(error_nr, buf, buflen);
 	if (result_code == 0)

gdk/gdk_posix.h

@@ -182,7 +182,10 @@ gdk_export int strerror_r(int errnum, char *buf, size_t buflen);
 static inline const char *
 GDKstrerror(int errnum, char *buf, size_t buflen)
 {
-#if !defined(_GNU_SOURCE) || ((_POSIX_C_SOURCE >= 200112L) && !_GNU_SOURCE)
+#if !defined(_GNU_SOURCE) || ( \
+	(defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L) \
+	&& defined(_GNU_SOURCE) && !_GNU_SOURCE) \
+	|| defined(__MUSL__)
 	if (strerror_r(errnum, buf, buflen) == 0)
 		return buf;
 	snprintf(buf, buflen, "Unknown error %d", errnum);

monetdb_config.h.in

@@ -82,6 +82,21 @@
 #define WIN32 1
 #endif
 
+/* MUSL detection */
+#ifndef _GNU_SOURCE
+    #define _GNU_SOURCE
+    #include <features.h>
+    #ifndef __USE_GNU
+        #define __MUSL__
+    #endif
+    #undef _GNU_SOURCE
+#else
+    #include <features.h>
+    #ifndef __USE_GNU
+        #define __MUSL__
+    #endif
+#endif
+
 // Section: monetdb configure defines
 #cmakedefine HAVE_DISPATCH_DISPATCH_H 1
 #cmakedefine HAVE_DLFCN_H 1

tools/merovingian/daemon/merovingian.c

@@ -92,6 +92,14 @@
 #define pipe2(pipefd, flags)	pipe(pipefd)
 #endif
 
+#ifndef S_IRWXG
+#define S_IRWXG 0070
+#endif
+
+#ifndef S_IRWXO
+#define S_IRWXO 0007
+#endif
+
 /* private structs */
 
 typedef struct _threadlist {

tools/merovingian/daemon/snapshot.c

@@ -18,7 +18,11 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#ifdef __MUSL__
+#include <fcntl.h>
+#else
 #include <sys/fcntl.h>
+#endif
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <time.h>