add -Wextra -pedantic to native CFLAGS
add -Wextra -pedantic to native CFLAGS

it's all about code quality

ximus/RIOT,ros2/ros2_embedded_riot,spium/IoT-RIOT,chris-wood/RIOT,immesys/RiSyn,marcosalm/RIOT,smlng/RIOT,emmanuelsearch/RIOT,thiagohd/RIOT,mfrey/RIOT,ntrtrung/RIOT,dkm/RIOT,roberthartung/RIOT,beurdouche/RIOT,ximus/RIOT,attdona/RIOT,immesys/RiSyn,jremmert-phytec-iot/RIOT,kaspar030/RIOT,changbiao/RIOT,toonst/RIOT,Lotterleben/RIOT,phiros/RIOT,OTAkeys/RIOT,asanka-code/RIOT,emmanuelsearch/RIOT,MohmadAyman/RIOT,locicontrols/RIOT,latsku/RIOT,immesys/RiSyn,watr-li/RIOT,roberthartung/RIOT,fnack/RIOT,l3nko/RIOT,kaleb-himes/RIOT,fnack/RIOT,biboc/RIOT,authmillenon/RIOT,JensErdmann/RIOT,DipSwitch/RIOT,ant9000/RIOT,jhollister/RIOT,cladmi/RIOT,rousselk/RIOT,automote/RIOT,MonsterCode8000/RIOT,neumodisch/RIOT,adrianghc/RIOT,rousselk/RIOT,avmelnikoff/RIOT,kerneltask/RIOT,malosek/RIOT,Hyungsin/RIOT-OS,ant9000/RIOT,BytesGalore/RIOT,TobiasFredersdorf/RIOT,abkam07/RIOT,altairpearl/RIOT,jremmert-phytec-iot/RIOT,ntrtrung/RIOT,RBartz/RIOT,Yonezawa-T2/RIOT,brettswann/RIOT,mtausig/RIOT,patkan/RIOT,josephnoir/RIOT,adrianghc/RIOT,miri64/RIOT,binarylemon/RIOT,attdona/RIOT,RIOT-OS/RIOT,locicontrols/RIOT,1blankz7/RIOT,kbumsik/RIOT,Hyungsin/RIOT-OS,stevenj/RIOT,jremmert-phytec-iot/RIOT,herrfz/RIOT-old,chris-wood/RIOT,hamilton-mote/RIOT-OS,arvindpdmn/RIOT,robixnai/RIOT,yogo1212/RIOT,stevenj/RIOT,DipSwitch/RIOT,adjih/RIOT,centurysys/RIOT,gautric/RIOT,ros2/ros2_embedded_riot,smlng/RIOT,koenning/RIOT,gbarnett/RIOT,spium/IoT-RIOT,mfrey/RIOT,kushalsingh007/RIOT,benoit-canet/RIOT,JensErdmann/RIOT,cladmi/RIOT,luciotorre/RIOT,kaleb-himes/RIOT,TobiasFredersdorf/RIOT,smlng/RIOT,asanka-code/RIOT,sumanpanchal/RIOT,phiros/RIOT,abp719/RIOT,patkan/RIOT,RBartz/RIOT,BytesGalore/PetersRIOT,avmelnikoff/RIOT,zhuoshuguo/RIOT,l3nko/RIOT,MarkXYang/RIOT,l3nko/RIOT,rousselk/RIOT,openkosmosorg/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,daniel-k/RIOT,Josar/RIOT,asanka-code/RIOT,thiagohd/RIOT,fnack/RIOT,gebart/RIOT,Hyungsin/RIOT-OS,thomaseichinger/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,ros2/ros2_embedded_riot,lazytech-org/RIOT,DipSwitch/RIOT,toonst/RIOT,LudwigOrtmann/RIOT,basilfx/RIOT,Darredevil/RIOT,kaleb-himes/RIOT,benoit-canet/RIOT,Lexandro92/RIOT-CoAP,arvindpdmn/RIOT,beurdouche/RIOT,patkan/RIOT,AnonMall/RIOT,authmillenon/RIOT,alex1818/RIOT,bartfaizoltan/RIOT,koenning/RIOT,arvindpdmn/RIOT,gebart/RIOT,AnonMall/RIOT,patkan/RIOT,OlegHahm/RIOT,shady33/RIOT,latsku/RIOT,koenning/RIOT,mfrey/RIOT,Ell-i/RIOT,MarkXYang/RIOT,daniel-k/RIOT,phiros/RIOT,mtausig/RIOT,sumanpanchal/RIOT,jhollister/RIOT,openkosmosorg/RIOT,arvindpdmn/RIOT,FrancescoErmini/RIOT,immesys/RiSyn,RBartz/RIOT,jferreir/RIOT,wentaoshang/RIOT,malosek/RIOT,lebrush/RIOT,ntrtrung/RIOT,dailab/RIOT,tfar/RIOT,centurysys/RIOT,Lotterleben/RIOT,herrfz/RIOT,daniel-k/RIOT,TobiasFredersdorf/RIOT,Ell-i/RIOT,1blankz7/RIOT,rfswarm/RIOT,katezilla/RIOT,altairpearl/RIOT,changbiao/RIOT,gbarnett/RIOT,gebart/RIOT,LudwigKnuepfer/RIOT,binarylemon/RIOT,sgso/RIOT,kaspar030/RIOT,Yonezawa-T2/RIOT,PSHIVANI/Riot-Code,ntrtrung/RIOT,ros2/ros2_embedded_riot,Josar/RIOT,tdautc19841202/RIOT,jasonatran/RIOT,sumanpanchal/RIOT,luciotorre/RIOT,kaspar030/RIOT,d00616/RIOT,asanka-code/RIOT,OTAkeys/RIOT,benoit-canet/RIOT,centurysys/RIOT,rakendrathapa/RIOT,OTAkeys/RIOT,mziegert/RIOT,x3ro/RIOT,MonsterCode8000/RIOT,kushalsingh007/RIOT,daniel-k/RIOT,ximus/RIOT,MarkXYang/RIOT,chris-wood/RIOT,Osblouf/RIOT,ant9000/RIOT,kushalsingh007/RIOT,RubikonAlpha/RIOT,JensErdmann/RIOT,RubikonAlpha/RIOT,1blankz7/RIOT,yogo1212/RIOT,Osblouf/RIOT,phiros/RIOT,arvindpdmn/RIOT,jremmert-phytec-iot/RIOT,kaleb-himes/RIOT,abp719/RIOT,rfswarm/RIOT,authmillenon/RIOT,avmelnikoff/RIOT,attdona/RIOT,EmuxEvans/RIOT,kerneltask/RIOT,rakendrathapa/RIOT,MarkXYang/RIOT,roberthartung/RIOT,Yonezawa-T2/RIOT,rakendrathapa/RIOT,automote/RIOT,adjih/RIOT,jasonatran/RIOT,marcosalm/RIOT,Lexandro92/RIOT-CoAP,abkam07/RIOT,Darredevil/RIOT,herrfz/RIOT,ThanhVic/RIOT,koenning/RIOT,abp719/RIOT,jhollister/RIOT,MohmadAyman/RIOT,watr-li/RIOT,fnack/RIOT,sgso/RIOT,kYc0o/RIOT,kushalsingh007/RIOT,brettswann/RIOT,tfar/RIOT,backenklee/RIOT,adrianghc/RIOT,robixnai/RIOT,bartfaizoltan/RIOT,mfrey/RIOT,abp719/RIOT,rfuentess/RIOT,avmelnikoff/RIOT,chris-wood/RIOT,plushvoxel/RIOT,BytesGalore/PetersRIOT,backenklee/RIOT,patkan/RIOT,lebrush/RIOT,EmuxEvans/RIOT,rousselk/RIOT,adrianghc/RIOT,A-Paul/RIOT,dhruvvyas90/RIOT,Hyungsin/RIOT-OS,gautric/RIOT,MonsterCode8000/RIOT,msolters/RIOT,kb2ma/RIOT,benoit-canet/RIOT,PSHIVANI/Riot-Code,AnonMall/RIOT,toonst/RIOT,aeneby/RIOT,dailab/RIOT,msolters/RIOT,yogo1212/RIOT,ks156/RIOT,zhuoshuguo/RIOT,wentaoshang/RIOT,MonsterCode8000/RIOT,LudwigKnuepfer/RIOT,zhuoshuguo/RIOT,d00616/RIOT,backenklee/RIOT,gautric/RIOT,MohmadAyman/RIOT,MohmadAyman/RIOT,x3ro/RIOT,rfswarm/RIOT,bartfaizoltan/RIOT,LudwigKnuepfer/RIOT,thomaseichinger/RIOT,RIOT-OS/RIOT,rfswarm2/RIOT,lebrush/RIOT,rajma996/RIOT,rajma996/RIOT,msolters/RIOT,FrancescoErmini/RIOT,sgso/RIOT,sgso/RIOT,malosek/RIOT,marcosalm/RIOT,LudwigKnuepfer/RIOT,syin2/RIOT,sumanpanchal/RIOT,locicontrols/RIOT,Lotterleben/RIOT,changbiao/RIOT,brettswann/RIOT,basilfx/RIOT,l3nko/RIOT,herrfz/RIOT-old,PSHIVANI/Riot-Code,mziegert/RIOT,watr-li/RIOT,haoyangyu/RIOT,jbeyerstedt/RIOT-OTA-update,AnonMall/RIOT,khhhh/RIOT,plushvoxel/RIOT,rfuentess/RIOT,FrancescoErmini/RIOT,dkm/RIOT,AnonMall/RIOT,Osblouf/RIOT,plushvoxel/RIOT,jferreir/RIOT,dailab/RIOT,ros2/ros2_embedded_riot,OlegHahm/RIOT,jbeyerstedt/RIOT-OTA-update,nsol-nmsu/RIOT,OTAkeys/RIOT,ximus/RIOT,RubikonAlpha/RIOT,Ell-i/RIOT,kaleb-himes/RIOT,mtausig/RIOT,dhruvvyas90/RIOT,binarylemon/RIOT,OlegHahm/RIOT,aeneby/RIOT,khhhh/RIOT,jfischer-phytec-iot/RIOT,RBartz/RIOT,binarylemon/RIOT,JensErdmann/RIOT,jfischer-phytec-iot/RIOT,spium/IoT-RIOT,abkam07/RIOT,yogo1212/RIOT,spium/IoT-RIOT,luciotorre/RIOT,d00616/RIOT,nsol-nmsu/RIOT,latsku/RIOT,automote/RIOT,Josar/RIOT,kYc0o/RIOT,haoyangyu/RIOT,ant9000/RIOT,dkm/RIOT,chris-wood/RIOT,kerneltask/RIOT,robixnai/RIOT,miri64/RIOT,neumodisch/RIOT,kerneltask/RIOT,hamilton-mote/RIOT-OS,brettswann/RIOT,rajma996/RIOT,lazytech-org/RIOT,lazytech-org/RIOT,asanka-code/RIOT,alignan/RIOT,mziegert/RIOT,jferreir/RIOT,Ell-i/RIOT,EmuxEvans/RIOT,shady33/RIOT,herrfz/RIOT,asanka-code/RIOT,authmillenon/RIOT,zhuoshuguo/RIOT,nsol-nmsu/RIOT,gebart/RIOT,stevenj/RIOT,aeneby/RIOT,d00616/RIOT,yogo1212/RIOT,MonsterCode8000/RIOT,koenning/RIOT,malosek/RIOT,dhruvvyas90/RIOT,josephnoir/RIOT,MohmadAyman/RIOT,BytesGalore/RIOT,kerneltask/RIOT,rakendrathapa/RIOT,latsku/RIOT,stevenj/RIOT,haoyangyu/RIOT,cladmi/RIOT,rfswarm/RIOT,jremmert-phytec-iot/RIOT,abp719/RIOT,mziegert/RIOT,kbumsik/RIOT,Darredevil/RIOT,x3ro/RIOT,authmillenon/RIOT,beurdouche/RIOT,dhruvvyas90/RIOT,EmuxEvans/RIOT,x3ro/RIOT,jferreir/RIOT,d00616/RIOT,ant9000/RIOT,haoyangyu/RIOT,toonst/RIOT,gautric/RIOT,ks156/RIOT,BytesGalore/PetersRIOT,alignan/RIOT,RIOT-OS/RIOT,haoyangyu/RIOT,Hyungsin/RIOT-OS,LudwigKnuepfer/RIOT,locicontrols/RIOT,binarylemon/RIOT,RBartz/RIOT,emmanuelsearch/RIOT,LudwigOrtmann/RIOT,kYc0o/RIOT,marcosalm/RIOT,LudwigOrtmann/RIOT,daniel-k/RIOT,x3ro/RIOT,syin2/RIOT,biboc/RIOT,RubikonAlpha/RIOT,BytesGalore/PetersRIOT,malosek/RIOT,Lotterleben/RIOT,plushvoxel/RIOT,altairpearl/RIOT,RubikonAlpha/RIOT,rfswarm2/RIOT,khhhh/RIOT,jbeyerstedt/RIOT-OTA-update,tdautc19841202/RIOT,aeneby/RIOT,ThanhVic/RIOT,rousselk/RIOT,Osblouf/RIOT,thiagohd/RIOT,automote/RIOT,josephnoir/RIOT,spium/IoT-RIOT,nsol-nmsu/RIOT,JensErdmann/RIOT,jremmert-phytec-iot/RIOT,marcosalm/RIOT,locicontrols/RIOT,stevenj/RIOT,rakendrathapa/RIOT,alignan/RIOT,katezilla/RIOT,patkan/RIOT,haoyangyu/RIOT,robixnai/RIOT,latsku/RIOT,jasonatran/RIOT,1blankz7/RIOT,altairpearl/RIOT,benoit-canet/RIOT,ThanhVic/RIOT,dkm/RIOT,jferreir/RIOT,tdautc19841202/RIOT,basilfx/RIOT,kYc0o/RIOT,wentaoshang/RIOT,rfswarm/RIOT,brettswann/RIOT,hamilton-mote/RIOT-OS,adjih/RIOT,Lotterleben/RIOT,BytesGalore/RIOT,1blankz7/RIOT,PSHIVANI/Riot-Code,rfswarm2/RIOT,locicontrols/RIOT,Lotterleben/RIOT,mfrey/RIOT,dailab/RIOT,DipSwitch/RIOT,josephnoir/RIOT,neumodisch/RIOT,shady33/RIOT,adjih/RIOT,ximus/RIOT,LudwigOrtmann/RIOT,katezilla/RIOT,gbarnett/RIOT,altairpearl/RIOT,syin2/RIOT,adrianghc/RIOT,daniel-k/RIOT,lebrush/RIOT,tfar/RIOT,kb2ma/RIOT,MarkXYang/RIOT,mziegert/RIOT,emmanuelsearch/RIOT,emmanuelsearch/RIOT,MonsterCode8000/RIOT,EmuxEvans/RIOT,luciotorre/RIOT,jhollister/RIOT,changbiao/RIOT,msolters/RIOT,dailab/RIOT,zhuoshuguo/RIOT,JensErdmann/RIOT,automote/RIOT,herrfz/RIOT,DipSwitch/RIOT,biboc/RIOT,rfuentess/RIOT,tdautc19841202/RIOT,benoit-canet/RIOT,dhruvvyas90/RIOT,adjih/RIOT,changbiao/RIOT,robixnai/RIOT,EmuxEvans/RIOT,lazytech-org/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,neumodisch/RIOT,kaspar030/RIOT,kb2ma/RIOT,immesys/RiSyn,wentaoshang/RIOT,spium/IoT-RIOT,Osblouf/RIOT,gautric/RIOT,sumanpanchal/RIOT,roberthartung/RIOT,Darredevil/RIOT,roberthartung/RIOT,altairpearl/RIOT,BytesGalore/PetersRIOT,Lexandro92/RIOT-CoAP,ntrtrung/RIOT,smlng/RIOT,alex1818/RIOT,luciotorre/RIOT,khhhh/RIOT,abkam07/RIOT,jbeyerstedt/RIOT-OTA-update,Yonezawa-T2/RIOT,Josar/RIOT,neiljay/RIOT,rajma996/RIOT,jfischer-phytec-iot/RIOT,thomaseichinger/RIOT,openkosmosorg/RIOT,phiros/RIOT,rajma996/RIOT,toonst/RIOT,tdautc19841202/RIOT,Lexandro92/RIOT-CoAP,l3nko/RIOT,backenklee/RIOT,1blankz7/RIOT,Darredevil/RIOT,miri64/RIOT,A-Paul/RIOT,rfswarm2/RIOT,OlegHahm/RIOT,alignan/RIOT,thomaseichinger/RIOT,centurysys/RIOT,A-Paul/RIOT,FrancescoErmini/RIOT,shady33/RIOT,watr-li/RIOT,avmelnikoff/RIOT,biboc/RIOT,ThanhVic/RIOT,basilfx/RIOT,kbumsik/RIOT,beurdouche/RIOT,rousselk/RIOT,PSHIVANI/Riot-Code,jhollister/RIOT,centurysys/RIOT,lazytech-org/RIOT,neiljay/RIOT,ximus/RIOT,phiros/RIOT,Lexandro92/RIOT-CoAP,syin2/RIOT,DipSwitch/RIOT,alex1818/RIOT,TobiasFredersdorf/RIOT,TobiasFredersdorf/RIOT,msolters/RIOT,miri64/RIOT,jbeyerstedt/RIOT-OTA-update,lebrush/RIOT,beurdouche/RIOT,bartfaizoltan/RIOT,A-Paul/RIOT,rfswarm2/RIOT,backenklee/RIOT,PSHIVANI/Riot-Code,RIOT-OS/RIOT,herrfz/RIOT,dhruvvyas90/RIOT,katezilla/RIOT,robixnai/RIOT,herrfz/RIOT-old,Yonezawa-T2/RIOT,alignan/RIOT,fnack/RIOT,A-Paul/RIOT,MohmadAyman/RIOT,rakendrathapa/RIOT,gbarnett/RIOT,kYc0o/RIOT,malosek/RIOT,Lotterleben/RIOT,FrancescoErmini/RIOT,ntrtrung/RIOT,BytesGalore/PetersRIOT,shady33/RIOT,mtausig/RIOT,ks156/RIOT,sgso/RIOT,d00616/RIOT,biboc/RIOT,kbumsik/RIOT,thiagohd/RIOT,hamilton-mote/RIOT-OS,kb2ma/RIOT,marcosalm/RIOT,mtausig/RIOT,stevenj/RIOT,rfuentess/RIOT,lebrush/RIOT,brettswann/RIOT,ros2/ros2_embedded_riot,bartfaizoltan/RIOT,alex1818/RIOT,jferreir/RIOT,Osblouf/RIOT,attdona/RIOT,smlng/RIOT,zhuoshuguo/RIOT,ros2/ros2_embedded_riot,kushalsingh007/RIOT,nsol-nmsu/RIOT,wentaoshang/RIOT,changbiao/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,tfar/RIOT,abkam07/RIOT,syin2/RIOT,shady33/RIOT,binarylemon/RIOT,jasonatran/RIOT,neiljay/RIOT,herrfz/RIOT,openkosmosorg/RIOT,wentaoshang/RIOT,OTAkeys/RIOT,neiljay/RIOT,RubikonAlpha/RIOT,attdona/RIOT,jfischer-phytec-iot/RIOT,l3nko/RIOT,ThanhVic/RIOT,kb2ma/RIOT,ThanhVic/RIOT,OlegHahm/RIOT,rfswarm/RIOT,sgso/RIOT,openkosmosorg/RIOT,abp719/RIOT,msolters/RIOT,yogo1212/RIOT,hamilton-mote/RIOT-OS,neumodisch/RIOT,Yonezawa-T2/RIOT,MarkXYang/RIOT,alex1818/RIOT,BytesGalore/PetersRIOT,locicontrols/RIOT,gbarnett/RIOT,miri64/RIOT,rfswarm2/RIOT,kbumsik/RIOT,basilfx/RIOT,sumanpanchal/RIOT,centurysys/RIOT,neumodisch/RIOT,LudwigOrtmann/RIOT,mziegert/RIOT,luciotorre/RIOT,rajma996/RIOT,latsku/RIOT,AnonMall/RIOT,rfuentess/RIOT,jasonatran/RIOT,BytesGalore/RIOT,tfar/RIOT,openkosmosorg/RIOT,josephnoir/RIOT,jfischer-phytec-iot/RIOT,khhhh/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,thiagohd/RIOT,kaspar030/RIOT,watr-li/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,kushalsingh007/RIOT,watr-li/RIOT,FrancescoErmini/RIOT,Lexandro92/RIOT-CoAP,alex1818/RIOT,khhhh/RIOT,plushvoxel/RIOT,aeneby/RIOT,herrfz/RIOT-old,chris-wood/RIOT,ks156/RIOT,koenning/RIOT,immesys/RiSyn,cladmi/RIOT,tdautc19841202/RIOT,jhollister/RIOT,cladmi/RIOT,BytesGalore/RIOT,Ell-i/RIOT,ks156/RIOT,dkm/RIOT,attdona/RIOT,gbarnett/RIOT,emmanuelsearch/RIOT,fnack/RIOT,Josar/RIOT,arvindpdmn/RIOT,thiagohd/RIOT,katezilla/RIOT,LudwigOrtmann/RIOT,Darredevil/RIOT,automote/RIOT,neiljay/RIOT,gebart/RIOT,RBartz/RIOT,bartfaizoltan/RIOT,thomaseichinger/RIOT,abkam07/RIOT,herrfz/RIOT-old