diff --git a/.drone.jsonnet b/.drone.jsonnet
index a3f9e52..e7c0a68 100644
--- a/.drone.jsonnet
+++ b/.drone.jsonnet
@@ -1,4 +1,4 @@
-local Pipeline(image, version, arch, depinstall, extra) = {
+local Pipeline(image, version, arch, depinstall, extra, gccExtra, clangExtra, tccExtra) = {
   kind: "pipeline",
   type: "docker",
   name: image+"-"+version+"-"+arch,
@@ -11,7 +11,7 @@ local Pipeline(image, version, arch, depinstall, extra) = {
       name: "build-gcc",
       image: image+":"+version,
       commands: [
-        depinstall+" make gcc "+extra,
+        depinstall+" make "+extra+" "+gccExtra,
         "make clean",
         "make CC=gcc all"
       ]
@@ -20,32 +20,36 @@ local Pipeline(image, version, arch, depinstall, extra) = {
       name: "build-clang",
       image: image+":"+version,
       commands: [
-        depinstall+" make clang "+extra,
+        depinstall+" make "+extra+" "+clangExtra,
         "make clean",
         "make CC=clang all"
       ]
-    },
-    {
-     name: "build-tcc",
-     image: image+":"+version,
-     commands: [
-      depinstall+" make tcc "+extra,
-      "make clean",
-      "make CC=tcc all"
-     ]
     }
-  ]
+  ] + (if tccExtra != "" then [
+      {
+       name: "build-tcc",
+       image: image+":"+version,
+       commands: [
+        depinstall+" make "+extra+" "+tccExtra,
+        "make clean",
+        "make CC=tcc all"
+       ]
+      }
+     ] else []
+  )
 };
 
-local AptPipeline(image, version, arch, extra="") = Pipeline(image, version, arch, "apt update && DEBIAN_FRONTEND=noninteractive apt install -y", extra);
+local AptPipeline(image, version, arch, extra="", gccExtra="gcc", clangExtra="clang", tccExtra="tcc") = Pipeline(image, version, arch, "apt update && DEBIAN_FRONTEND=noninteractive apt install -y", extra, gccExtra, clangExtra, tccExtra);
 
-local PacManPipeline(image, version, arch, extra="") = Pipeline(image, version, arch, "pacman -Syy && pacman --noconfirm -S", extra);
+local PacManPipeline(image, version, arch, extra="", gccExtra="gcc", clangExtra="clang", tccExtra="tcc") = Pipeline(image, version, arch, "pacman -Syy && pacman --noconfirm -S", extra, gccExtra, clangExtra, tccExtra);
 
-local ApkPipeline(image, version, arch, extra="") = Pipeline(image, version, arch, "apk add --update gcc musl-dev", extra);
+local ApkPipeline(image, version, arch, extra="musl-dev linux-headers", gccExtra="gcc", clangExtra="gcc clang", tccExtra="tcc") = Pipeline(image, version, arch, "apk add --update", extra, gccExtra, clangExtra, tccExtra);
 
-local YumPipeline(image, version, arch, extra="") = Pipeline(image, version, arch, "yum install -y", extra);
+local YumPipeline(image, version, arch, extra="", gccExtra="gcc", clangExtra="clang", tccExtra="") = Pipeline(image, version, arch, "yum install -y", extra, gccExtra, clangExtra, tccExtra);
 
-local XbpsPipeline(image, version, arch, extra="") = Pipeline(image, version, arch, "xbps-install -Sy", extra);
+local XbpsPipeline(image, version, arch, extra="", gccExtra="gcc", clangExtra="clang", tccExtra="tcc kernel-libc-headers") = Pipeline(image, version, arch, "xbps-install -Sy", extra, gccExtra, clangExtra, tccExtra);
+
+#
 
 [
   AptPipeline("ubuntu", "20.04", "amd64"),
@@ -70,8 +74,8 @@ local XbpsPipeline(image, version, arch, extra="") = Pipeline(image, version, ar
   PacManPipeline("archlinux", "latest", "amd64"),
 
 
-  ApkPipeline("alpine", "latest", "amd64", "linux-headers"),
-  ApkPipeline("alpine", "latest", "arm64", "linux-headers"),
+  ApkPipeline("alpine", "edge", "amd64"),
+  ApkPipeline("alpine", "edge", "arm64"),
 
 
   XbpsPipeline("voidlinux/voidlinux", "latest", "amd64"),
diff --git a/Makefile b/Makefile
index dc71917..52007de 100644
--- a/Makefile
+++ b/Makefile
@@ -1,10 +1,12 @@
 CC=cc
-CFLAGS=-ggdb -std=gnu99 -Wall -Werror -Wno-unknown-pragmas -Wno-packed-bitfield-compat
+CFLAGS=-ggdb -Wall -Werror -pedantic -Wno-unknown-pragmas -Wno-packed-bitfield-compat
 
 ifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1)
-	CFLAGS += -O0 -Wno-unknown-warning-option
+	CFLAGS += -O0 -std=gnu99 -Wno-unknown-warning-option
+else ifeq ($(shell $(CC) -v 2>&1 | grep -c "tcc version"), 1)
+    CFLAGS += -std=c99
 else
-	CFLAGS += -Og
+	CFLAGS += -Og -std=gnu99
 endif
 
 default: fm10k-dump fm10k-flash
diff --git a/src/fm10k-dump.c b/src/fm10k-dump.c
index 918702d..8871324 100644
--- a/src/fm10k-dump.c
+++ b/src/fm10k-dump.c
@@ -149,4 +149,4 @@ int main(int argc, char **argv) {
     printf("\nRead %u bytes\n", bootImageSize);
 
     return 0;
-}
\ No newline at end of file
+}
diff --git a/src/fm10k-flash.c b/src/fm10k-flash.c
index 6212ffb..5c859e9 100644
--- a/src/fm10k-flash.c
+++ b/src/fm10k-flash.c
@@ -264,4 +264,4 @@ int main(int argc, char **argv) {
     printf("\nWritten %u bytes\n", bootImageSizeMax);
 
     return 0;
-}
\ No newline at end of file
+}
diff --git a/src/fm10k.c b/src/fm10k.c
index 9986e8d..24991b3 100644
--- a/src/fm10k.c
+++ b/src/fm10k.c
@@ -160,10 +160,10 @@ SPI_COMMAND_READ_MANUFACTURER_RESULT fm10k_mem_spi_ReadManufacturerData(uintptr_
     WriteRegister32(mem, FM10K_REGISTER_SPI_HEADER, header);
 
     /* first loop only: set send header flag. Following loops: shift only data. */
-    spiCtrl.fields.Command |= 0b0001;
-    spiCtrl.fields.Command |= 0b0100;
+    spiCtrl.fields.Command |= 0x1;
+    spiCtrl.fields.Command |= 0x4;
     spiCtrl.fields.HeaderSize = 1;
-    spiCtrl.fields.DataSize = 4 & 0b11;
+    spiCtrl.fields.DataSize = 0x4 & 3;
 
     if (fm10k_mem_spi_SetCtrlReg(mem, spiCtrl)) {
         return result;
@@ -178,7 +178,7 @@ SPI_COMMAND_READ_MANUFACTURER_RESULT fm10k_mem_spi_ReadManufacturerData(uintptr_
 
 
     /* release CS */
-    spiCtrl.fields.Command = 0b1000;
+    spiCtrl.fields.Command = 0x8;
     if (fm10k_mem_spi_SetCtrlReg(mem, spiCtrl)) {
         result.value = 0;
         return result;
@@ -221,15 +221,15 @@ uint32_t fm10k_mem_spi_ReadFlash(uintptr_t mem, uint32_t address, uint8_t *data,
     WriteRegister32(mem, FM10K_REGISTER_SPI_HEADER, header);
 
     /* first loop only: set send header flag. Following loops: shift only data. */
-    spiCtrl.fields.Command |= 0b0001;
+    spiCtrl.fields.Command |= 0x1;
 
     cnt = 0;
     while (cnt < len) {
         /* determine the number of data bytes to read [1..4] */
         numRead = (len - cnt) > 3 ? 4 : (len - cnt);
         /* set 'shift data' flag and number of data bytes */
-        spiCtrl.fields.Command |= 0b0100;
-        spiCtrl.fields.DataSize = numRead & 0b11;
+        spiCtrl.fields.Command |= 0x4;
+        spiCtrl.fields.DataSize = numRead & 3;
 
         if (fm10k_mem_spi_SetCtrlReg(mem, spiCtrl)) {
             return 1;
@@ -244,12 +244,12 @@ uint32_t fm10k_mem_spi_ReadFlash(uintptr_t mem, uint32_t address, uint8_t *data,
             data[cnt++] = (rxData >> (numRead * 8)) & 0xff;
         }
 
-        spiCtrl.fields.Command = 0b0000;
-        spiCtrl.fields.DataSize = 0b0000;
+        spiCtrl.fields.Command = 0;
+        spiCtrl.fields.DataSize = 0;
     }
 
     /* release CS */
-    spiCtrl.fields.Command = 0b1000;
+    spiCtrl.fields.Command = 0x8;
     if (fm10k_mem_spi_SetCtrlReg(mem, spiCtrl)) {
         return 1;
     }
@@ -286,7 +286,7 @@ uint32_t fm10k_mem_spi_EnableSectorProtection(uintptr_t mem) {
     WriteRegister32(mem, FM10K_REGISTER_SPI_HEADER, header);
 
     /* first loop only: set send header flag. Following loops: shift only data. */
-    spiCtrl.fields.Command |= 0b0001;
+    spiCtrl.fields.Command |= 0x1;
 
     /* send command to the flash */
     if (fm10k_mem_spi_SetCtrlReg(mem, spiCtrl)) {
@@ -294,7 +294,7 @@ uint32_t fm10k_mem_spi_EnableSectorProtection(uintptr_t mem) {
     }
 
     /* release CS */
-    spiCtrl.fields.Command = 0b1000;
+    spiCtrl.fields.Command = 0x8;
     if (fm10k_mem_spi_SetCtrlReg(mem, spiCtrl)) {
         return 1;
     }
@@ -330,7 +330,7 @@ uint32_t fm10k_mem_spi_DisableSectorProtection(uintptr_t mem) {
     WriteRegister32(mem, FM10K_REGISTER_SPI_HEADER, header);
 
     /* first loop only: set send header flag. Following loops: shift only data. */
-    spiCtrl.fields.Command |= 0b0001;
+    spiCtrl.fields.Command |= 0x1;
 
     /* send command to the flash */
     if (fm10k_mem_spi_SetCtrlReg(mem, spiCtrl)) {
@@ -338,7 +338,7 @@ uint32_t fm10k_mem_spi_DisableSectorProtection(uintptr_t mem) {
     }
 
     /* release CS */
-    spiCtrl.fields.Command = 0b1000;
+    spiCtrl.fields.Command = 0x8;
     if (fm10k_mem_spi_SetCtrlReg(mem, spiCtrl)) {
         return 1;
     }
@@ -379,15 +379,15 @@ uint32_t fm10k_mem_spi_WriteFlash(uintptr_t mem, uint32_t address, const uint8_t
     WriteRegister32(mem, FM10K_REGISTER_SPI_HEADER, header);
 
     /* first loop only: set send header flag. Following loops: shift only data. */
-    spiCtrl.fields.Command |= 0b0001;
+    spiCtrl.fields.Command |= 0x1;
 
     cnt = 0;
     while (cnt < len) {
         /* determine the number of data bytes to read [1..4] */
         numWrite = (len - cnt) > 3 ? 4 : (len - cnt);
         /* set 'shift data' flag and number of data bytes */
-        spiCtrl.fields.Command |= 0b0100;
-        spiCtrl.fields.DataSize = numWrite & 0b11;
+        spiCtrl.fields.Command |= 0x4;
+        spiCtrl.fields.DataSize = numWrite & 3;
 
         txData = 0;
         while (numWrite--) {
@@ -401,12 +401,12 @@ uint32_t fm10k_mem_spi_WriteFlash(uintptr_t mem, uint32_t address, const uint8_t
             return 1;
         }
 
-        spiCtrl.fields.Command = 0b0000;
-        spiCtrl.fields.DataSize = 0b0000;
+        spiCtrl.fields.Command = 0;
+        spiCtrl.fields.DataSize = 0;
     }
 
     /* release CS */
-    spiCtrl.fields.Command = 0b1000;
+    spiCtrl.fields.Command = 0x8;
     if (fm10k_mem_spi_SetCtrlReg(mem, spiCtrl)) {
         return 1;
     }
@@ -573,4 +573,4 @@ FM10K_PCI_DEVICE fm10k_pci_findDevice() {
     closedir(folder);
 
     return device;
-}
\ No newline at end of file
+}
diff --git a/src/fm10k.h b/src/fm10k.h
index 499174d..41e624e 100644
--- a/src/fm10k.h
+++ b/src/fm10k.h
@@ -166,4 +166,5 @@ typedef struct {
     char bar4Path[PATH_MAX];
 } FM10K_PCI_DEVICE;
 
-FM10K_PCI_DEVICE fm10k_pci_findDevice();
\ No newline at end of file
+FM10K_PCI_DEVICE fm10k_pci_findDevice();
+
diff --git a/src/test.c b/src/test.c
index 0c2b86b..5167f2f 100644
--- a/src/test.c
+++ b/src/test.c
@@ -54,4 +54,4 @@ int main(int argc, char **argv) {
 
     printf("\nTests run, failed %u/%u\n", testsFailed, tests);
     return testsFailed > 0 ? 1 : 0;
-}
\ No newline at end of file
+}